[{"data":1,"prerenderedAt":1452},["ShallowReactive",2],{"blog-edmund-fitzgerald-why-the-great-lakes-freighter-sank":3,"related-blogs-edmund-fitzgerald-why-the-great-lakes-freighter-sank":400},{"id":4,"title":5,"author":6,"body":7,"coverImg":389,"description":390,"extension":391,"head":6,"meta":392,"navigation":393,"path":394,"publishedAt":395,"schemaOrg":6,"seo":396,"sitemap":397,"stem":398,"updatedAt":6,"__hash__":399},"blog\u002Fblog\u002F2026\u002F11\u002Fedmund-fitzgerald-why-the-great-lakes-freighter-sank.md","Edmund Fitzgerald: Why the Great Lakes Freighter Sank",null,{"type":8,"value":9,"toc":357},"minimark",[10,19,22,25,30,33,49,117,122,125,128,132,135,138,142,145,148,152,155,158,162,169,172,176,179,194,198,201,208,212,215,219,226,230,239,243,246,249,253,256,270,274,277,281,284,291,295,298,301,305,308,312,315,318,321,325,332,336,339,347,351,354],[11,12,13,14,18],"p",{},"The Edmund Fitzgerald was a 729-foot Great Lakes ore freighter that sank in a November storm on Lake Superior on 10 November 1975, taking all 29 men aboard with it. ",[15,16,17],"strong",{},"Nobody knows for certain why it went down."," The U.S. Coast Guard and the National Transportation Safety Board blamed flooding through the cargo hatches, while others point to a shoal near Caribou Island, giant waves, or a hull that broke under the strain.",[11,20,21],{},"There was no distress call. The ship simply vanished from the radar of the freighter following it, roughly 17 miles from the shelter of Whitefish Bay. Fifty years on, the wreck still draws thousands of people to memorials, and the questions it left behind are still argued over.",[11,23,24],{},"This guide covers what the ship was, how its final voyage unfolded, what the official investigations concluded, and why so many experts disagree with them.",[26,27,29],"h2",{"id":28},"what-was-the-edmund-fitzgerald","What Was the Edmund Fitzgerald?",[11,31,32],{},"The SS Edmund Fitzgerald was a \"straightdecker\" bulk carrier, the classic long and narrow design built to haul iron ore through the locks and rivers of the Great Lakes. It was built as Hull 301 at Great Lakes Engineering Works in River Rouge, Michigan, launched in June 1958, and named after the president and chairman of Northwestern Mutual Life Insurance Company, which owned it as an investment.",[11,34,35,36,39,40,48],{},"When it entered service, ",[15,37,38],{},"it was the largest ship on the Great Lakes",", a title the ",[41,42,47],"a",{"href":43,"target":44,"rel":45},"https:\u002F\u002Fwww.shipwreckmuseum.com\u002Fedmund-fitzgerald\u002F","_blank",[46],"noopener","Shipwreck Historical Society"," says it held for 13 years, until 1971. Sailors called it \"Big Fitz\". By 1975 it had logged over a million miles, the equivalent of 44 trips around the world.",[50,51,52,65],"table",{},[53,54,55],"thead",{},[56,57,58,62],"tr",{},[59,60,61],"th",{},"Specification",[59,63,64],{},"Edmund Fitzgerald",[66,67,68,77,85,93,101,109],"tbody",{},[56,69,70,74],{},[71,72,73],"td",{},"Length",[71,75,76],{},"729 feet (222 m)",[56,78,79,82],{},[71,80,81],{},"Beam",[71,83,84],{},"75 feet",[56,86,87,90],{},[71,88,89],{},"Depth",[71,91,92],{},"39 feet",[56,94,95,98],{},[71,96,97],{},"Gross tonnage",[71,99,100],{},"13,632",[56,102,103,106],{},[71,104,105],{},"Engine",[71,107,108],{},"7,500 hp steam turbine",[56,110,111,114],{},[71,112,113],{},"Usual cargo",[71,115,116],{},"Taconite pellets from Minnesota and Wisconsin",[118,119,121],"h3",{"id":120},"the-ships-working-life","The ship's working life",[11,123,124],{},"The Fitzgerald spent its career shuttling taconite, iron ore processed into marble-sized pellets, from the western end of Lake Superior to steel mills around Detroit and Toledo. It usually ran empty on the return leg.",[11,126,127],{},"Northwestern Mutual placed the ship under permanent charter to the Columbia Transportation Division of Oglebay Norton Company in Cleveland. Like most lakers of its era, it was designed for the narrow locks rather than the open ocean, which matters later in this story. These are vessels you will not see anywhere else in the world: very long, very thin, and built to squeeze the largest possible cargo through the lock system.",[26,129,131],{"id":130},"the-final-voyage-of-the-ss-edmund-fitzgerald","The Final Voyage of the SS Edmund Fitzgerald",[11,133,134],{},"On the afternoon of 9 November 1975, the Fitzgerald left the Burlington Northern dock in Superior, Wisconsin, loaded with 26,116 long tons of taconite bound for Zug Island near Detroit. Captain Ernest McSorley, 63, had been a ship's master since 1951 and in command of the Fitzgerald since 1972. He and five of his crew planned to retire at the end of the season.",[11,136,137],{},"Soon after departure, the Fitzgerald was joined by the Arthur M. Anderson, which had sailed from Two Harbors, Minnesota. The two freighters stayed in radio contact for the rest of the trip, with the faster Fitzgerald in the lead, between 10 and 15 miles ahead.",[118,139,141],{"id":140},"a-storm-builds-over-lake-superior","A storm builds over Lake Superior",[11,143,144],{},"Gale warnings went out at 7 pm on 9 November and were upgraded to storm warnings early the next morning. A fast-moving arctic front and a warm, wet system from the southwest collided over the lake.",[11,146,147],{},"McSorley took a more northerly course than usual, along the Canadian shore, where the highlands blunted the wind. That kept the ship out of the recommended shipping lanes along the south shore. At 7 am on 10 November, the Fitzgerald sent its last weather report: 35-knot winds and waves of about ten feet.",[118,149,151],{"id":150},"passing-caribou-island","Passing Caribou Island",[11,153,154],{},"Around 3:15 pm, the Anderson's captain, Jesse \"Bernie\" Cooper, watched the Fitzgerald round Caribou Island and remarked that it was much closer to Six Fathom Shoal than he would have wanted his own ship to be.",[11,156,157],{},"As the afternoon wore on, the Fitzgerald was in trouble. It had a list, had lost both radars, and was taking heavy seas over the deck. The captain radioed: \"I have a bad list, lost both radars and am taking heavy seas over the deck. One of the worst seas I've ever been in.\" The radio beacon at Whitefish Point, which the ship could have used to find its way, was not working. McSorley slowed down and asked the Anderson to help him navigate.",[118,159,161],{"id":160},"we-are-holding-our-own","\"We are holding our own\"",[11,163,164,165,168],{},"At 7:10 pm, the Anderson warned the Fitzgerald about northbound traffic ahead and asked how it was making out with its problem. The reply was ",[15,166,167],{},"\"We are holding our own.\""," Those were the last words anyone heard from the ship.",[11,170,171],{},"Minutes later the Fitzgerald disappeared from the Anderson's radar. Repeated calls went unanswered. Searchers, including the Anderson and the William Clay Ford, found only an oil slick, two empty lifeboats and nearly three dozen life jackets that no one had put on.",[26,173,175],{"id":174},"the-sinking-of-the-edmund-fitzgerald-what-investigators-found","The Sinking of the Edmund Fitzgerald: What Investigators Found",[11,177,178],{},"Two U.S. agencies investigated. The Coast Guard convened a Marine Board of Investigation in Cleveland on 18 November 1975, and the National Transportation Safety Board ran its own analysis alongside it.",[11,180,181,182,187,188,193],{},"The Coast Guard's ",[41,183,186],{"href":184,"target":44,"rel":185},"https:\u002F\u002Fwww.dco.uscg.mil\u002FPortals\u002F9\u002FDCO%20Documents\u002F5p\u002FCG-5PC\u002FINV\u002Fdocs\u002Fboards\u002Fedmundfitz.pdf",[46],"Marine Board report"," concluded that the ship sank after its cargo hold flooded through ineffective hatch closures. The Safety Board's ",[41,189,192],{"href":190,"target":44,"rel":191},"https:\u002F\u002Fwww.ntsb.gov\u002Finvestigations\u002FAccidentReports\u002FReports\u002FMAR7803.pdf",[46],"1978 accident report"," reached a similar verdict: the probable cause was sudden, massive flooding of the cargo hold after one or more hatch covers collapsed.",[118,195,197],{"id":196},"why-the-hatches-came-under-suspicion","Why the hatches came under suspicion",[11,199,200],{},"The evidence for the hatch theory was partly about the Fitzgerald and partly about the whole fleet. At its last inspection on 31 October 1975, ten days before the sinking, the Coast Guard noted four minor structural defects around the hatches and ordered them repaired.",[11,202,203,204,207],{},"After the accident, Coast Guard and Safety Board inspectors checked other Great Lakes bulk carriers and found ",[15,205,206],{},"hatch covers that were not weathertight even with the clamps in place and fastened",", because many clamps were badly adjusted. Both agencies' structural analyses showed that the standard hatch design would have let significant amounts of water into the hold in the seas the Fitzgerald faced.",[118,209,211],{"id":210},"how-deep-the-ship-was-loaded","How deep the ship was loaded",[11,213,214],{},"The NTSB also pointed to load line rules. Amendments in 1969, 1971 and 1973 had allowed Great Lakes ore carriers to load deeper, leaving less hull above the water. Author John U. Bacon has noted that the Fitzgerald sat only about 11 feet out of the water on a good day, which left little margin when waves broke over its deck for hours.",[26,216,218],{"id":217},"theories-on-why-the-edmund-fitzgerald-sank","Theories on Why the Edmund Fitzgerald Sank",[11,220,221,222,225],{},"The official finding has never settled the debate. ",[15,223,224],{},"A ship this size rarely sinks for a single reason",", and most serious accounts now treat the theories below as pieces of one chain of events rather than competing answers.",[118,227,229],{"id":228},"theory-1-flooding-through-the-hatches","Theory 1: flooding through the hatches",[11,231,232,233,238],{},"This is the Coast Guard and NTSB position. Its critics argue that a failed hatch cover would have sunk the ship quickly, not after hours of struggle. Bacon, interviewed in a ",[41,234,237],{"href":235,"target":44,"rel":236},"https:\u002F\u002Fwww.history.com\u002Farticles\u002Fedmund-fitzgerald-sinking-lake-superior",[46],"History article",", put it bluntly: \"If the hatch cover did give in, it would have gone down instantly. It would not have taken four or five hours of struggling along the way.\"",[118,240,242],{"id":241},"theory-2-striking-six-fathom-shoal","Theory 2: striking Six Fathom Shoal",[11,244,245],{},"Cooper's own observation from the Anderson placed the Fitzgerald close to Six Fathom Shoal north of Caribou Island, where some spots are only about 11 feet deep.",[11,247,248],{},"The NTSB report itself acknowledged that the chart in use did not show the full extent of shallow water north of Caribou Island, an area known as North Bank, and after the accident the Coast Guard asked the Canadian Hydrographic Service to resurvey it. Striking bottom could have torn or cracked the hull and let water in slowly, which would fit the list McSorley reported hours before the end. In the pounding seas, the crew may never have felt the impact.",[118,250,252],{"id":251},"theory-3-rogue-waves-and-the-storm-itself","Theory 3: rogue waves and the storm itself",[11,254,255],{},"Waves on the Great Lakes behave differently from ocean swells. According to Bacon, they are sharper and arrive much closer together, around 4 to 8 seconds apart compared with 10 to 16 seconds at sea. That leaves a ship less time to recover between blows.",[11,257,258,259,264,265,269],{},"The Coast Guard noted that forecast wave heights are significant wave heights, and the single highest wave can be up to twice that figure. A 2006 ",[41,260,263],{"href":261,"target":44,"rel":262},"https:\u002F\u002Fjournals.ametsoc.org\u002Fview\u002Fjournals\u002Fbams\u002F87\u002F5\u002Fbams-87-5-607.pdf",[46],"storm reexamination"," by meteorologists recreated the most probable winds and waves of that night. Newer modelling cited by Bacon suggests the crew likely faced two or three 54-foot waves and possibly a 60-foot one. If you want to understand how such outliers form, our guide to how ",[41,266,268],{"href":267},"https:\u002F\u002Fprimonautic.com\u002Fblog\u002Frogue-waves-what-causes-them-and-how-ships-survive","rogue waves form"," covers the physics.",[118,271,273],{"id":272},"theory-4-structural-failure","Theory 4: structural failure",[11,275,276],{},"Great Lakes freighters are long and slender, and the Fitzgerald was roughly ten times longer than it was wide. One proposed failure mode is that the ship rode with its bow on one wave crest and its stern on another, leaving the heavy, fully loaded middle unsupported. A hull already weakened by flooding or a grounding could then have snapped. The wreck, found in two pieces, is consistent with this, though it cannot prove the ship broke on the surface rather than when it hit the bottom.",[26,278,280],{"id":279},"the-edmund-fitzgerald-wreck-today","The Edmund Fitzgerald Wreck Today",[11,282,283],{},"The wreck lies in Canadian waters about 17 miles north-northwest of Whitefish Point, Michigan, at a depth of about 530 feet. It was positively identified in May 1976 using remotely controlled cameras.",[11,285,286,287,290],{},"The hull is broken in two. ",[15,288,289],{},"The stern rests upside down, while the heavily damaged bow sits upright nearby",", the two pieces roughly 170 feet apart and surrounded by twisted debris. No bodies were ever recovered from the Fitzgerald.",[118,292,294],{"id":293},"the-bell-recovered-in-1995","The bell recovered in 1995",[11,296,297],{},"The Great Lakes Shipwreck Historical Society ran expeditions to the wreck in 1989, 1994 and 1995. On 4 July 1995, at the request of the crew's families, an expedition raised the ship's 200-pound bronze bell. The expedition was a joint effort with the National Geographic Society, the Canadian Navy, Sony and the Sault Ste. Marie Tribe of Chippewa Indians.",[11,299,300],{},"A replica engraved with the names of the 29 men was left on the wreck. The original bell is on display at the Great Lakes Shipwreck Museum at Whitefish Point, where it is rung 29 times every 10 November, once for each crew member, and once more for everyone else lost on the Great Lakes.",[118,302,304],{"id":303},"a-protected-grave-site","A protected grave site",[11,306,307],{},"Families of the crew pushed for the wreck to be treated as a grave site. In 2006 Ontario amended its Heritage Act to extend the protected perimeter around the Fitzgerald to 500 meters, and no expedition has visited the site since 1995.",[26,309,311],{"id":310},"the-wreck-of-the-edmund-fitzgerald-song","The Wreck of the Edmund Fitzgerald Song",[11,313,314],{},"Most people who know the name learned it from Canadian folk singer Gordon Lightfoot. His 1976 ballad, \"The Wreck of the Edmund Fitzgerald\", turned a regional tragedy into one of the best-known shipwrecks in the world, second only to the Titanic in books, film and media, according to the Shipwreck Historical Society.",[11,316,317],{},"The song also mentions the memorial in Detroit. That is the Mariners' Church, whose pastor rang its bell 29 times, once for each of the lost men, the day after the sinking. Lightfoot also changed the lyrics over the years as new evidence moved blame away from the crew's handling of the hatches. When he died on 1 May 2023, the Mariners' Church rang its bell 30 times: 29 for the crew and one for him.",[11,319,320],{},"The 50th anniversary in November 2025 showed how strong the pull remains. More than three thousand people attended the daytime memorial at Whitefish Point, and hundreds of thousands watched the evening ceremony online.",[26,322,324],{"id":323},"what-changed-on-the-great-lakes-after-the-fitzgerald","What Changed on the Great Lakes After the Fitzgerald",[11,326,327,328,331],{},"The NTSB recommended a design study for better hatch covers and clamps, and limits on operating in sea states beyond what a vessel can handle. The Coast Guard board pressed for improvements to lifesaving equipment. The disaster pushed improvements in radar, navigational charts and ship-to-shore communication. According to Bacon, ",[15,329,330],{},"not a single major commercial ship has sunk on the Great Lakes since",".",[118,333,335],{"id":334},"following-the-lakers-today","Following the lakers today",[11,337,338],{},"Ore freighters still make the same run across Lake Superior that the Fitzgerald made. The difference is visibility. Modern freighters broadcast their position over AIS, so anyone ashore can see where a laker is and how fast it is moving.",[11,340,341,342,346],{},"In Primo Nautic you can search a Great Lakes freighter by name, MMSI or IMO number and follow its live position, speed and course on the map. Primo Nautic also shows the weather at the vessel's exact location, including wind speed and visibility, which on Lake Superior in November is often the most interesting part of the picture. If you watch ships from the Duluth and Superior harbour, our ",[41,343,345],{"href":344},"https:\u002F\u002Fprimonautic.com\u002Fblog\u002Fduluth-ship-schedule-track-great-lakes-vessels-live","Duluth ship schedule"," guide explains how to see which lakers are arriving next, and the Ship Enthusiast setting in Primo Nautic adds background on the vessel types you spot.",[26,348,350],{"id":349},"conclusion","Conclusion",[11,352,353],{},"The Edmund Fitzgerald was the largest ship on the Great Lakes when it was launched and remains the largest ever lost there. It sank on 10 November 1975, about 17 miles from shelter, after hours of fighting a storm with hurricane-force gusts and very large waves.",[11,355,356],{},"The official investigations blamed flooding through hatch covers that were not weathertight. Many mariners and historians point instead to a grounding on Six Fathom Shoal, extreme waves, or a long hull that failed under stress, and the likeliest answer combines several of these. What is certain is that the loss put hatch design under scrutiny and pushed changes in charting, radar and communication, and that the 29 men aboard are still remembered every November with a bell that rings once for each of them.",{"title":358,"searchDepth":359,"depth":359,"links":360},"",2,[361,365,370,374,380,384,385,388],{"id":28,"depth":359,"text":29,"children":362},[363],{"id":120,"depth":364,"text":121},3,{"id":130,"depth":359,"text":131,"children":366},[367,368,369],{"id":140,"depth":364,"text":141},{"id":150,"depth":364,"text":151},{"id":160,"depth":364,"text":161},{"id":174,"depth":359,"text":175,"children":371},[372,373],{"id":196,"depth":364,"text":197},{"id":210,"depth":364,"text":211},{"id":217,"depth":359,"text":218,"children":375},[376,377,378,379],{"id":228,"depth":364,"text":229},{"id":241,"depth":364,"text":242},{"id":251,"depth":364,"text":252},{"id":272,"depth":364,"text":273},{"id":279,"depth":359,"text":280,"children":381},[382,383],{"id":293,"depth":364,"text":294},{"id":303,"depth":364,"text":304},{"id":310,"depth":359,"text":311},{"id":323,"depth":359,"text":324,"children":386},[387],{"id":334,"depth":364,"text":335},{"id":349,"depth":359,"text":350},"https:\u002F\u002Fmedia.primonautic.com\u002Fblog\u002Fedmund-fitzgerald-why-the-great-lakes-freighter-sank.jpg","The Edmund Fitzgerald sank in Lake Superior on 10 November 1975 with all 29 crew. The ship, its last voyage, and the theories on why it went down.","md",{},true,"\u002Fblog\u002F2026\u002F11\u002Fedmund-fitzgerald-why-the-great-lakes-freighter-sank","2026-11-12",{"title":5,"description":390},{"loc":394},"blog\u002F2026\u002F11\u002Fedmund-fitzgerald-why-the-great-lakes-freighter-sank","zFETc_2tYO4qn6NieBVWfjwO_uCxO0Xw1WMTUcCv8Xc",[401,656,1080],{"id":402,"title":403,"author":6,"body":404,"coverImg":647,"description":648,"extension":391,"head":6,"meta":649,"navigation":393,"path":650,"publishedAt":651,"schemaOrg":6,"seo":652,"sitemap":653,"stem":654,"updatedAt":6,"__hash__":655},"blog\u002Fblog\u002F2026\u002F05\u002Fduluth-ship-schedule-track-great-lakes-vessels-live.md","Duluth Ship Schedule: Track Great Lakes Vessels Live",{"type":8,"value":405,"toc":636},[406,409,412,416,425,431,434,438,446,449,465,468,472,479,482,492,496,499,511,517,523,529,535,541,545,548,554,564,570,574,577,580,594,602,606,615,618,621,625,628,631,633],[11,407,408],{},"The Duluth ship schedule shows which vessels are expected at the Port of Duluth-Superior and when they will pass through the canal. Most people find the static schedule online, check the estimated arrival time, and then head to Canal Park to watch the ship lift the iconic Aerial Lift Bridge. That works fine until weather delays a vessel by six hours or the schedule simply hasn't been updated. Real-time AIS tracking closes that gap completely.",[11,410,411],{},"This guide covers how to find the traditional Duluth ship schedule, its limitations, and how to use live vessel tracking so you never miss a ship passing through the canal.",[26,413,415],{"id":414},"what-is-the-duluth-ship-schedule","What Is the Duluth Ship Schedule?",[11,417,418,419,424],{},"The Port of Duluth-Superior is one of the largest freshwater ports in North America. In 2021 alone, the ",[41,420,423],{"href":421,"target":44,"rel":422},"https:\u002F\u002Fwww.duluthport.com",[46],"Duluth port"," handled over 33.7 million tons of freight, including iron ore, coal, limestone, and grain bound for steel mills and power plants across the Great Lakes region.",[11,426,427,430],{},[15,428,429],{},"Duluth publishes a ship schedule"," listing upcoming vessel arrivals and departures at the port. It is compiled from captain-reported ETAs and port booking data. You can find it through the Duluth Seaway Port Authority's website, as well as through dedicated ship watching sites that aggregate canal traffic data for enthusiasts.",[11,432,433],{},"The schedule covers both \"lakers\" (lake freighters designed specifically for Great Lakes navigation) and \"salties\" (oceangoing vessels that arrive from the Atlantic via the St. Lawrence Seaway). Salties are a special draw at Canal Park because of their international flags and unusual hull shapes.",[26,435,437],{"id":436},"why-the-static-schedule-falls-short","Why the Static Schedule Falls Short",[11,439,440,441,445],{},"The traditional schedule shows estimated times, not live positions. A freighter like the ",[442,443,444],"em",{},"Paul R. Tregurtha"," or a saltie from Rotterdam might be listed for a 3 PM canal transit, but if it encountered headwinds crossing Lake Superior, it could arrive at 7 PM. You would have no way of knowing without checking an external source.",[11,447,448],{},"A few reasons the schedule alone is not enough:",[450,451,452,456,459,462],"ul",{},[453,454,455],"li",{},"Arrival times shift constantly based on lake conditions, wind, and current traffic in the canal",[453,457,458],{},"Weather delays in spring are common, especially early in the navigation season (the 2026 season opened with the first oceangoing arrival on April 8)",[453,460,461],{},"Salties do not always appear in the same databases as domestic lakers",[453,463,464],{},"The schedule does not show a vessel's current position, speed, or how many miles it still has to travel",[11,466,467],{},"For a quick trip to Canal Park, being off by a few hours matters. That is where AIS comes in.",[26,469,471],{"id":470},"how-ais-tracking-works-for-great-lakes-vessels","How AIS Tracking Works for Great Lakes Vessels",[11,473,474,478],{},[41,475,477],{"href":476},"https:\u002F\u002Fprimonautic.com\u002Fblog\u002Fais-vessel-tracking-explained-how-ships-are-found-at-sea","AIS vessel tracking"," works by reading transponder signals that every commercial ship is required to broadcast. These signals transmit the vessel's name, MMSI number, position, speed, course, and destination in real time. AIS receivers on shore and on satellites pick up these signals and feed them into tracking platforms.",[11,480,481],{},"On the Great Lakes, both lakers and salties are required to carry AIS transponders. That means you can track any scheduled vessel from the moment it leaves its last port, watch it cross Lake Superior, and see exactly when it is approaching the Duluth-Superior Harbor entrance.",[11,483,484,487,488,491],{},[15,485,486],{},"The key difference from the static schedule:"," AIS shows you where the ship is right now. If the ",[442,489,490],{},"Edwin H. Gott"," is 40 miles east of the canal at 12 knots, you can calculate that it will arrive in roughly three hours, regardless of what the printed schedule says.",[26,493,495],{"id":494},"how-to-track-any-duluth-bound-vessel-step-by-step","How to Track Any Duluth-Bound Vessel Step by Step",[11,497,498],{},"Here is a practical workflow for following a vessel before it reaches Canal Park.",[11,500,501,504,505,510],{},[15,502,503],{},"Step 1: Find the vessel name."," Check the Duluth ship schedule for today's expected arrivals and note the vessel name. For lakers, common names include ships operated by ",[41,506,509],{"href":507,"target":44,"rel":508},"https:\u002F\u002Fwww.interlakesteamship.com",[46],"Interlake Steamship",", Great Lakes Fleet, and Canada Steamship Lines. Interlake Steamship alone moves around 18 million tons of raw materials annually across its 10-vessel fleet.",[11,512,513,516],{},[15,514,515],{},"Step 2: Search by vessel name in a tracking app."," Open a vessel tracking app and search for the vessel by name. This pulls up the ship's live AIS position on a map.",[11,518,519,522],{},[15,520,521],{},"Step 3: Check the ship's current position and speed."," Note the vessel's location, current speed in knots, and heading. If it is still 50 miles out on Lake Superior, you have time. If it is already inside the harbor at the ore docks, the canal transit has passed.",[11,524,525,528],{},[15,526,527],{},"Step 4: Set up a notification."," Most AIS apps let you get an alert when a tracked vessel enters a specific area or approaches port. Primo Nautic, for example, sends push notifications when a vessel you are following departs or arrives, so you do not have to keep checking the map manually.",[11,530,531,534],{},[15,532,533],{},"Step 5: Monitor the AI-calculated ETA."," Unlike the captain-reported schedule ETA, a live-calculated ETA adjusts in real time based on the ship's current speed and remaining distance. If lake conditions slow the vessel down, the ETA updates immediately.",[11,536,537,540],{},[15,538,539],{},"Step 6: Head to Canal Park at the right time."," With a live ETA in hand, you know when to arrive. The Duluth Aerial Lift Bridge typically raises about 10-15 minutes before a vessel passes through, giving you a visual cue on the ground.",[26,542,544],{"id":543},"vessel-types-to-expect-at-the-duluth-canal","Vessel Types to Expect at the Duluth Canal",[11,546,547],{},"Understanding what you are looking at makes ship watching more rewarding.",[11,549,550,553],{},[15,551,552],{},"Lake freighters (lakers)"," are the most common vessels at Duluth. They are purpose-built for the Great Lakes and typically stretch 600-1,000 feet in length. Self-unloaders are the most recognizable type: they carry a conveyor belt system that allows them to discharge cargo without dock cranes. You will often see them loading iron ore pellets at the docks on the Duluth side before heading to steel mills in Indiana or Ohio.",[11,555,556,559,560,563],{},[15,557,558],{},"Salties"," are oceangoing bulk carriers or general cargo ships that enter the Great Lakes through the St. Lawrence Seaway. They are generally smaller than lakers because of the Seaway's lock dimensions. Spotting a saltie with a foreign flag from an unexpected country is one of the highlights of canal watching. ",[15,561,562],{},"Salties typically appear at Duluth between spring Seaway opening (late March) and mid-December"," when winter ice closes the system.",[11,565,566,569],{},[15,567,568],{},"Tug and barge combinations"," also pass through the canal, though these are smaller and less frequent than the large bulk carriers.",[26,571,573],{"id":572},"best-practices-for-ship-watching-at-canal-park","Best Practices for Ship Watching at Canal Park",[11,575,576],{},"Canal Park is Duluth's most visited area and is purpose-built for ship watching. The Aerial Lift Bridge sits at the canal entrance, and the surrounding pathways give clear sightlines in both directions.",[11,578,579],{},"A few tips that make the experience better:",[450,581,582,585,588,591],{},[453,583,584],{},"Arrive 15-20 minutes before the AIS-calculated ETA. The ship's approach from the lake gives you time to position yourself.",[453,586,587],{},"The north side of the canal offers an unobstructed view of vessels leaving the harbor headed out to Lake Superior.",[453,589,590],{},"Early morning transits in calm weather are visually striking: the lake is flat, light is soft, and vessel names are easier to read.",[453,592,593],{},"Bring binoculars. Even large vessels move at 8-12 knots through the canal, so there is time to read the vessel name, flag, and port of registration on the stern.",[11,595,596,597,601],{},"For tracking vessels you cannot identify visually, you can look up a ship's MMSI number and get detailed voyage information. Our guide to the ",[41,598,600],{"href":599},"https:\u002F\u002Fprimonautic.com\u002Fblog\u002Fmmsi-number-explained-find-any-ship-in-seconds","MMSI number"," explains how to use that identifier to pull up a vessel in any AIS platform.",[26,603,605],{"id":604},"the-great-lakes-navigation-season","The Great Lakes Navigation Season",[11,607,608,609,614],{},"Great Lakes shipping is seasonal. The navigation season runs roughly from late March through January, depending on ice conditions. The ",[41,610,613],{"href":611,"target":44,"rel":612},"https:\u002F\u002Fgreatlakes-seaway.com",[46],"Soo Locks"," in Michigan connect Lake Superior to the rest of the Great Lakes system, and their opening each spring marks the official start of the season.",[11,616,617],{},"The first oceangoing vessel to reach Duluth in 2026 arrived on April 8. In some years the first arrival comes as early as late March; in others, ice delays push it into May. Winter layup for most lakers runs December through March, so the schedule goes quiet for those months.",[11,619,620],{},"If you are planning a trip to Canal Park specifically to watch ships, aim for late April through October. Traffic is heaviest during summer and early fall when ore, grain, and coal shipments are at peak volume.",[26,622,624],{"id":623},"tracking-duluth-vessels-without-being-there","Tracking Duluth Vessels Without Being There",[11,626,627],{},"You do not need to be in Duluth to follow Great Lakes shipping traffic. Primo Nautic's live AIS map lets you search any vessel by name and watch it move across Lake Superior or navigate into the harbor, with AI-generated updates on weather conditions at the vessel's exact location, speed trends, and ETA confidence.",[11,629,630],{},"This is especially useful for ship enthusiasts who grew up near Canal Park and now live elsewhere, or for anyone planning a visit and wanting to monitor whether a specific ship will be in port on a particular date. Tracking a saltie's progress from the Gulf of St. Lawrence all the way into Duluth-Superior Harbor takes a few days and makes for a genuinely satisfying live voyage to follow.",[26,632,350],{"id":349},[11,634,635],{},"The Duluth ship schedule gives you a starting point, but real conditions on Lake Superior rarely match the printed estimate exactly. AIS tracking converts a static timetable into a live feed: you see the vessel's position, calculate the real arrival time, and get notified the moment something changes. For anyone visiting Canal Park or following Great Lakes shipping from home, combining the schedule with live AIS data is the most reliable way to watch the right ship at the right time.",{"title":358,"searchDepth":359,"depth":359,"links":637},[638,639,640,641,642,643,644,645,646],{"id":414,"depth":359,"text":415},{"id":436,"depth":359,"text":437},{"id":470,"depth":359,"text":471},{"id":494,"depth":359,"text":495},{"id":543,"depth":359,"text":544},{"id":572,"depth":359,"text":573},{"id":604,"depth":359,"text":605},{"id":623,"depth":359,"text":624},{"id":349,"depth":359,"text":350},"https:\u002F\u002Fmedia.primonautic.com\u002Fblog\u002Fduluth-ship-schedule-track-great-lakes-vessels-live.jpg","Find the Duluth ship schedule and learn how AIS tracking lets you follow any Great Lakes freighter, ore carrier, or saltie live from Canal Park or home.",{},"\u002Fblog\u002F2026\u002F05\u002Fduluth-ship-schedule-track-great-lakes-vessels-live","2026-05-03",{"title":403,"description":648},{"loc":650},"blog\u002F2026\u002F05\u002Fduluth-ship-schedule-track-great-lakes-vessels-live","vwFqmPoZpZJIc5UkTET4NdyVl3koYABjHZnpN4sh94o",{"id":657,"title":658,"author":6,"body":659,"coverImg":1071,"description":1072,"extension":391,"head":6,"meta":1073,"navigation":393,"path":1074,"publishedAt":1075,"schemaOrg":6,"seo":1076,"sitemap":1077,"stem":1078,"updatedAt":6,"__hash__":1079},"blog\u002Fblog\u002F2026\u002F11\u002Fshipping-containers-lost-at-sea-how-many-and-why.md","Shipping Containers Lost at Sea: How Many and Why",{"type":8,"value":660,"toc":1048},[661,664,667,671,691,695,698,707,779,782,786,792,795,799,802,806,815,824,828,831,834,838,841,844,848,851,855,858,930,933,937,940,949,953,956,960,963,970,974,977,986,990,993,997,1000,1003,1014,1017,1021,1024,1027,1040,1042,1045],[11,662,663],{},"About 1,478 shipping containers were lost at sea in 2025, out of roughly 280 million moved by ship that year. That is around 0.0005 percent of all container movements, according to the World Shipping Council, whose members run about 90 percent of the world's container ship capacity. The figure more than doubled from 2024, and one sinking off India accounted for 43 percent of it.",[11,665,666],{},"If you have cargo on a ship, or you have seen a beach covered in debris from a spilled box, the headline number only tells part of the story. Below you will find the year by year figures, the reasons containers go over the side, the worst losses on record, what happens to a container once it hits the water, and the reporting rules that took effect in January 2026.",[26,668,670],{"id":669},"key-findings-at-a-glance","Key Findings at a Glance",[450,672,673,676,679,682,685,688],{},[453,674,675],{},"1,478 containers were lost in 2025, up from 576 in 2024 and above the recent three-year average.",[453,677,678],{},"One incident, the sinking of MSC Elsa 3 off Kerala, accounted for 640 containers, or about 43 percent of the year's total.",[453,680,681],{},"2013 remains the worst year on record with 5,578 containers lost; 2023 was the best with 221.",[453,683,684],{},"128 containers were recovered in 2025, the highest recovery figure since the World Shipping Council started collecting recovery data in 2023.",[453,686,687],{},"Extreme roll is the dominant cause in major incidents: the TopTier research project linked it to 85 percent of the containers lost or damaged across 44 incidents studied.",[453,689,690],{},"Since 1 January 2026, reporting is mandatory. Ships must report every container lost or seen drifting, and flag states pass the numbers to the International Maritime Organization.",[26,692,694],{"id":693},"how-many-shipping-containers-are-lost-at-sea-each-year","How Many Shipping Containers Are Lost at Sea Each Year",[11,696,697],{},"The best long-running count comes from the World Shipping Council (WSC), the trade body for container lines. It has surveyed its members since 2011, covering losses back to 2008. Until 2020 it asked for three years of data at a time; since 2021 it reports every year. The council assumes the roughly 10 percent of capacity outside its membership loses containers at the same rate, and scales the total up to cover the whole industry.",[11,699,700,701,706],{},"The latest edition of the WSC's ",[41,702,705],{"href":703,"target":44,"rel":704},"https:\u002F\u002Fwww.worldshipping.org\u002Fcontainers-lost-at-sea",[46],"annual loss report"," gives these figures for the years it singles out:",[50,708,709,722],{},[53,710,711],{},[56,712,713,716,719],{},[59,714,715],{},"Year",[59,717,718],{},"Containers lost",[59,720,721],{},"What drove it",[66,723,724,735,746,757,768],{},[56,725,726,729,732],{},[71,727,728],{},"2013",[71,730,731],{},"5,578",[71,733,734],{},"MOL Comfort broke in two in the Indian Ocean",[56,736,737,740,743],{},[71,738,739],{},"2022",[71,741,742],{},"661",[71,744,745],{},"Out of 250 million transported",[56,747,748,751,754],{},[71,749,750],{},"2023",[71,752,753],{},"221",[71,755,756],{},"Lowest year on record",[56,758,759,762,765],{},[71,760,761],{},"2024",[71,763,764],{},"576",[71,766,767],{},"Below the 10-year average",[56,769,770,773,776],{},[71,771,772],{},"2025",[71,774,775],{},"1,478",[71,777,778],{},"MSC Elsa 3 sinking, 640 boxes",[11,780,781],{},"The averages matter as much as the single years. For the ten years up to 2024, the WSC put the average at 1,274 containers a year. Over the 15 years from 2008 to 2022 it was 1,566. The three-year average for 2022 to 2024 fell to 489, down from 1,061 for 2021 to 2023, which is why 2025 looks like a jump.",[118,783,785],{"id":784},"why-one-bad-year-skews-the-average","Why one bad year skews the average",[11,787,788,789],{},"Container losses are lumpy. A quiet year can see a few hundred boxes go over the side, and then a single casualty adds well over a thousand. ",[15,790,791],{},"The WSC's own reading of 2025 is that isolated large events, not a system-wide decline in safety, drive the swings.",[11,793,794],{},"The winter of 2020 to 2021 shows the effect. An unusually high number of incidents in those months pushed the 14-year average for 2008 to 2021 up to 1,629 containers, an 18 percent rise on the average for the period ending in 2019. Even then, the council noted, losses stayed under one thousandth of one percent of the roughly 241 million containers shipped each year.",[26,796,798],{"id":797},"why-containers-fall-overboard","Why Containers Fall Overboard",[11,800,801],{},"The WSC lists the main contributors to 2025's losses as severe weather in the North Atlantic and North Pacific, fire, cargo shift and stack collapse in rough seas, and individual casualties such as groundings and total losses. In most incidents several of these combine, with weather acting as the trigger.",[118,803,805],{"id":804},"parametric-rolling","Parametric rolling",[11,807,808,809,814],{},"The largest single cause is a ship motion most people have never heard of. Parametric rolling is the sudden onset of large, violent side-to-side rolls, and the ",[41,810,813],{"href":811,"target":44,"rel":812},"https:\u002F\u002Fwww.tsb.gc.ca\u002Feng\u002Fmedias-media\u002Ffiches-facts\u002Fm21p0297\u002Fm21p0297-20240731.html",[46],"Transportation Safety Board"," of Canada describes the conditions that start it as \"very common\". Modern container ships, with narrow hulls that widen into very large decks, are especially vulnerable.",[11,816,817,818,823],{},"The TopTier joint industry project, led by the Maritime Research Institute Netherlands with over 40 participants, studied 44 major incidents in which containers were lost or damaged. Extreme roll, synchronous or parametric, was the most likely cause in 24 of them. Measured by the number of containers, it accounted for 85 percent, because one violent roll can collapse several bays of deck stacks at once. The project's ",[41,819,822],{"href":820,"target":44,"rel":821},"https:\u002F\u002Fwww.sciencedirect.com\u002Fscience\u002Farticle\u002Fpii\u002FS0029801825030537",[46],"model test results"," come from 232 seakeeping tests on two large container ship designs of 10,000 and 15,000 containers, most of them in quartering seas.",[118,825,827],{"id":826},"lashing-failure-and-stack-collapse","Lashing failure and stack collapse",[11,829,830],{},"Containers on deck are held by twist locks at the corners and lashing rods across the stacks. When rolling exceeds what that gear was planned for, the lashings loosen or break and the stack comes down. In September 2026 the Philippine interisland ship Span Asia 39 reported heavy, continuous rolling in rough seas off Batangas; its lashings loosened and 46 empty containers went overboard, followed by one more in the Manila anchorage.",[11,832,833],{},"Stack collapse also starts inside the box. The WSC stresses that misdeclared weights or badly packed cargo can make a container unstable in heavy seas, and accurate weight declarations are what stowage and lashing plans are built on. If a box weighs far more than its paperwork says, every calculation built on that number is wrong.",[118,835,837],{"id":836},"fire-and-misdeclared-dangerous-goods","Fire and misdeclared dangerous goods",[11,839,840],{},"Ship fires have risen to their highest level in over a decade, according to the WSC, with misdeclared or undeclared dangerous goods named as a leading cause. A fire can destroy containers on board, destabilise the ship and in the worst cases sink it with everything it carries.",[11,842,843],{},"That is why the industry has tightened rules on specific cargoes. Since the start of 2026, all charcoal shipments must be declared as dangerous goods under the IMDG Code, after a series of fires caused by poorly handled charcoal. The WSC also launched a Cargo Safety Program in 2025 that screens bookings for high-risk shipments before they are loaded.",[118,845,847],{"id":846},"weather-on-the-big-ocean-routes","Weather on the big ocean routes",[11,849,850],{},"Bad weather turns a stowage weakness into a loss. The WSC notes that 2025 did not have more storms than average, but warmer ocean temperatures and more severe, less predictable weather in the North Atlantic and North Pacific made heavy-weather encounters more likely. In the UK alone, two separate incidents during Storm Goretti on the night of 8 January 2026 sent 24 containers into the sea within hours of each other.",[26,852,854],{"id":853},"the-biggest-container-losses-on-record","The Biggest Container Losses on Record",[11,856,857],{},"A handful of casualties account for a large share of all containers ever lost. These are the incidents the published investigations and industry reports name most often:",[50,859,860,874],{},[53,861,862],{},[56,863,864,867,869,871],{},[59,865,866],{},"Incident",[59,868,715],{},[59,870,718],{},[59,872,873],{},"What happened",[66,875,876,889,903,917],{},[56,877,878,881,883,886],{},[71,879,880],{},"MOL Comfort",[71,882,728],{},[71,884,885],{},"Drove that year's 5,578 total",[71,887,888],{},"Hull broke in two in the Indian Ocean",[56,890,891,894,897,900],{},[71,892,893],{},"ONE Apus",[71,895,896],{},"2020",[71,898,899],{},"1,816",[71,901,902],{},"Stack collapse in the North Pacific",[56,904,905,908,911,914],{},[71,906,907],{},"Maersk Essen",[71,909,910],{},"2021",[71,912,913],{},"750",[71,915,916],{},"Parametric rolling a factor",[56,918,919,922,924,927],{},[71,920,921],{},"MSC Elsa 3",[71,923,772],{},[71,925,926],{},"640",[71,928,929],{},"Listed and sank off Kochi, India",[11,931,932],{},"ONE Apus and Maersk Essen both appear in the Canadian safety board's list of container losses linked to parametric rolling. The run of losses in late 2020 and early 2021 is what triggered the TopTier project.",[118,934,936],{"id":935},"msc-elsa-3-off-kerala","MSC Elsa 3 off Kerala",[11,938,939],{},"MSC Elsa 3 developed a severe starboard list on 24 May 2025 while sailing from Vizhinjam to Kochi, about 30 nautical miles southwest of Kochi port. It sank and came to rest at roughly 60 metres. India's Directorate General of Shipping reported the ship was carrying about 367 tonnes of heavy fuel oil and 64 tonnes of diesel, along with 13 containers of calcium carbide classed as dangerous goods and 65 to 70 containers of plastic pellets.",[11,941,942,943,948],{},"By 1 June, 59 containers had washed up along a 120 km stretch of the Kerala coast. A month later, response teams were still recovering bags of plastic pellets from a container that drifted near Alappuzha, as the Directorate's ",[41,944,947],{"href":945,"target":44,"rel":946},"https:\u002F\u002Fsdma.kerala.gov.in\u002Fwp-content\u002Fuploads\u002F2025\u002F06\u002FMSC-ELSA-3-SITREP-31-1800-hrs-25062025.pdf",[46],"situation reports"," record. One casualty supplied 43 percent of the world's lost containers that year, and its cleanup was still running a month later.",[26,950,952],{"id":951},"what-happens-to-containers-lost-at-sea","What Happens to Containers Lost at Sea",[11,954,955],{},"Most people picture a lost container bobbing on the surface for weeks. Some do. Many sink almost at once.",[118,957,959],{"id":958},"how-long-a-lost-container-floats","How long a lost container floats",[11,961,962],{},"There is no single answer, because it depends on the cargo, the container type and how badly the box is damaged when it hits the water. The International Spill Control Organization explains that containers are not truly watertight, so most eventually sink. Containers that fall from the top of a large ocean-going ship often go down almost immediately after impact.",[11,964,965,966,969],{},"The exceptions are the dangerous ones. A box packed with light, buoyant cargo can float for years, even when it is holed and waterlogged. Refrigerated containers are built tighter to hold their atmosphere, and one may stay afloat until waves break it up. ",[15,967,968],{},"A container drifting just at or below the surface is close to invisible to a small boat",", which is why the Philippine Coast Guard issued a navigation warning for a busy shipping lane after the Span Asia 39 loss.",[118,971,973],{"id":972},"on-the-seabed","On the seabed",[11,975,976],{},"Containers that sink become part of the seafloor. In 2004 researchers at the Monterey Bay Aquarium Research Institute found one of 15 containers lost from the ship Med Taipei, resting at about 1,260 metres and filled with over a thousand steel-belted tyres.",[11,978,979,980,985],{},"By 2013, the ",[41,981,984],{"href":982,"target":44,"rel":983},"https:\u002F\u002Fwww.mbari.org\u002Fproject\u002Flost-shipping-container-study",[46],"MBARI container study"," showed it covered in animals usually found on rock outcrops, which are rare on that muddy stretch of seabed. The scientists also found mild changes in the sediment and in the animals living close to it, likely because bottom currents speed up around the box and wash finer sediment away.",[118,987,989],{"id":988},"are-lost-shipping-containers-recovered","Are lost shipping containers recovered",[11,991,992],{},"Rarely, but more often than before. In 2024 the WSC recorded two recovered containers; in 2025 it recorded 128, the most since it began tracking recoveries. The council credits better response coordination after incidents. Close to shore the odds rise further: off Kerala, dozens of boxes from MSC Elsa 3 washed onto beaches, where crews could lift them by crane and truck them to port.",[26,994,996],{"id":995},"new-rules-mandatory-reporting-from-2026","New Rules: Mandatory Reporting From 2026",[11,998,999],{},"Before 2026 there was no mandatory international reporting of lost containers, and the WSC's survey was the closest thing to an official count. That changed on 1 January 2026, when amendments to SOLAS Chapter V, regulations 31 and 32, adopted at the IMO's Maritime Safety Committee in its 108th session, entered into force.",[11,1001,1002],{},"The rules require:",[450,1004,1005,1008,1011],{},[453,1006,1007],{},"The ship's master to report any container lost overboard without delay to ships nearby, the nearest coastal state and the ship's flag state.",[453,1009,1010],{},"Reports of containers observed drifting at sea, not only those a ship loses itself.",[453,1012,1013],{},"Flag states to pass the figures on to the International Maritime Organization.",[11,1015,1016],{},"The aim is faster warnings to other ships, quicker response to drifting boxes and better data on where and why losses happen. The WSC says it will keep publishing its own survey alongside the official figures so the long-term series stays comparable.",[26,1018,1020],{"id":1019},"what-this-means-if-your-cargo-is-on-board","What This Means If Your Cargo Is on Board",[11,1022,1023],{},"For a single importer the odds are tiny, but they are not zero, and the WSC names the North Pacific and North Atlantic as the routes where heavy weather did the most damage in 2025. When a ship runs into a storm, confirming which boxes went over the side takes time, and the ship's own movements are often the first thing you can see.",[11,1025,1026],{},"That is where having your own view of the ship helps. Primo Nautic shows a vessel's live position, speed, course and the weather at its exact location, so you can see when a ship has slowed or altered course in a storm rather than waiting for an email. Its Cargo Shipment tracking purpose keeps the updates precise and logistics-focused, and delay notifications tell you when the arrival estimate slips.",[11,1028,1029,1030,1034,1035,1039],{},"If a box is lost, the claim runs through your ",[41,1031,1033],{"href":1032},"https:\u002F\u002Fprimonautic.com\u002Fblog\u002Fcargo-insurance-coverage-costs-and-when-you-need-it","cargo insurance",", which is the strongest argument for arranging cover before the goods leave the port. The size and shape of modern container ships are what make them vulnerable to parametric rolling, and the biggest of them are covered in our guide to ",[41,1036,1038],{"href":1037},"https:\u002F\u002Fprimonautic.com\u002Fblog\u002Flargest-container-ships-the-complete-size-guide","the largest container ships",", so it is worth knowing what kind of vessel your cargo is booked on. Primo Nautic lets you look any ship up by name, IMO number or MMSI before it sails.",[26,1041,350],{"id":349},[11,1043,1044],{},"Shipping containers lost at sea are rare against the scale of trade: 1,478 out of roughly 280 million in 2025, and an average of around 1,274 a year over the decade to 2024. The yearly totals swing widely because a single casualty, such as MOL Comfort in 2013 or MSC Elsa 3 in 2025, can outweigh every other incident combined.",[11,1046,1047],{},"Extreme roll in heavy weather is behind most of the containers lost in major incidents, with lashing failure, misdeclared cargo and fire making things worse. Once overboard, most containers sink, some drift for months or even years as a hazard to small boats, and only a small number are recovered. From 2026 every loss must be reported, which should finally give a complete, official count of how many boxes the sea takes each year.",{"title":358,"searchDepth":359,"depth":359,"links":1049},[1050,1051,1054,1060,1063,1068,1069,1070],{"id":669,"depth":359,"text":670},{"id":693,"depth":359,"text":694,"children":1052},[1053],{"id":784,"depth":364,"text":785},{"id":797,"depth":359,"text":798,"children":1055},[1056,1057,1058,1059],{"id":804,"depth":364,"text":805},{"id":826,"depth":364,"text":827},{"id":836,"depth":364,"text":837},{"id":846,"depth":364,"text":847},{"id":853,"depth":359,"text":854,"children":1061},[1062],{"id":935,"depth":364,"text":936},{"id":951,"depth":359,"text":952,"children":1064},[1065,1066,1067],{"id":958,"depth":364,"text":959},{"id":972,"depth":364,"text":973},{"id":988,"depth":364,"text":989},{"id":995,"depth":359,"text":996},{"id":1019,"depth":359,"text":1020},{"id":349,"depth":359,"text":350},"https:\u002F\u002Fmedia.primonautic.com\u002Fblog\u002Fshipping-containers-lost-at-sea-how-many-and-why.jpg","How many shipping containers are lost at sea? 1,478 went overboard in 2025. The yearly numbers, the causes, the worst losses and what happens next.",{},"\u002Fblog\u002F2026\u002F11\u002Fshipping-containers-lost-at-sea-how-many-and-why","2026-11-03",{"title":658,"description":1072},{"loc":1074},"blog\u002F2026\u002F11\u002Fshipping-containers-lost-at-sea-how-many-and-why","LV1pke2bjsJfodImS8o2MaBEo7BySSJW4i_kEplg6NY",{"id":1081,"title":1082,"author":6,"body":1083,"coverImg":1443,"description":1444,"extension":391,"head":6,"meta":1445,"navigation":393,"path":1446,"publishedAt":1447,"schemaOrg":6,"seo":1448,"sitemap":1449,"stem":1450,"updatedAt":6,"__hash__":1451},"blog\u002Fblog\u002F2026\u002F10\u002Feta-meaning-in-shipping-who-sets-it-and-why-it-changes.md","ETA Meaning in Shipping: Who Sets It and Why It Changes",{"type":8,"value":1084,"toc":1422},[1085,1088,1091,1095,1098,1105,1108,1112,1115,1119,1128,1131,1144,1148,1151,1159,1163,1166,1249,1252,1255,1259,1262,1266,1269,1273,1281,1285,1294,1300,1304,1307,1311,1314,1318,1321,1324,1333,1340,1344,1353,1356,1360,1363,1366,1370,1373,1411,1414,1416,1419],[11,1086,1087],{},"The ETA meaning in shipping is simple: Estimated Time of Arrival, the date and time a vessel is expected to reach its next port or a defined point such as the pilot station. What is less simple is who produces that number, how often it is updated, and why the ETA you saw on Monday can be two days off by Friday.",[11,1089,1090],{},"If you are waiting on a container, a cruise, or a family member working on board, the ETA is the one figure you care about most. This guide explains where a ship's ETA comes from, how it relates to the other port call times you will see in schedules, and how to read it without being caught out by a stale or optimistic entry.",[26,1092,1094],{"id":1093},"eta-meaning-in-shipping-and-its-full-form","ETA Meaning in Shipping and Its Full Form",[11,1096,1097],{},"The ETA full form in shipping is Estimated Time of Arrival. It is always an estimate made before the event, and it is replaced by the ATA, the Actual Time of Arrival, once the ship gets there.",[11,1099,1100,1101,1104],{},"The word \"arrival\" needs care. A ship can arrive at the port limits, at the anchorage, at the pilot boarding place, or alongside the berth, and each of those can be hours or days apart. ",[15,1102,1103],{},"When someone quotes an ETA, the first question is always \"arrival where?\""," A carrier schedule usually means arrival at the terminal, while a ship's own broadcast usually refers to the destination port as a whole.",[11,1106,1107],{},"ETAs are also given in UTC, coordinated universal time, in most maritime systems. A vessel due at 14:00 UTC in Singapore will tie up at 22:00 local time, which matters if you are planning a pickup or a phone call.",[26,1109,1111],{"id":1110},"who-sets-a-ships-eta","Who Sets a Ship's ETA",[11,1113,1114],{},"There are two main sources of an ETA, and they rarely agree to the minute: the ship itself, and the shipping line or port that plans around it.",[118,1116,1118],{"id":1117},"the-eta-in-the-ships-ais-signal","The ETA in the ship's AIS signal",[11,1120,1121,1122,1127],{},"Every large commercial ship carries an AIS transponder, and one of the messages it broadcasts holds voyage data, including destination and ETA. According to the US Coast Guard's ",[41,1123,1126],{"href":1124,"target":44,"rel":1125},"https:\u002F\u002Fwww.navcen.uscg.gov\u002Fais-class-a-static-voyage-message-5",[46],"Navigation Center",", the ETA field is stored as month, day, hour and minute in UTC, with a zero or out-of-range value meaning \"not available\".",[11,1129,1130],{},"Two consequences follow. There is no year in the field, so an ETA from last month can look like a future date to a casual reader. And a blank field is legal, so some ships simply broadcast nothing.",[11,1132,1133,1134,1139,1140,1143],{},"More important is who types it in. The IMO ",[41,1135,1138],{"href":1136,"target":44,"rel":1137},"https:\u002F\u002Fwwwcdn.imo.org\u002Flocalresources\u002Fen\u002FOurWork\u002FSafety\u002FDocuments\u002FAIS\u002FResolution%20A.1106%2829%29.pdf",[46],"AIS operating guidelines"," say destination and ETA are to be manually entered at the start of the voyage and kept up to date as necessary, by the officer of the watch using a keyboard. ",[15,1141,1142],{},"The AIS ETA is a human entry, not a calculation",", so it is only as current as the last time someone on the bridge updated it.",[118,1145,1147],{"id":1146},"the-eta-in-a-carrier-or-port-schedule","The ETA in a carrier or port schedule",[11,1149,1150],{},"Shipping lines publish their own ETAs in sailing schedules and container tracking pages. These come from the planned rotation of the service and are revised by the carrier's operations team as the voyage progresses.",[11,1152,1153,1154,1158],{},"Ports and terminals hold a third version. The ship's agent sends ETA notices to the terminal, and the berth plan is built around them. At the Port of Shanghai, for example, a World Maritime University dissertation describes agents confirming the ETA to the terminal 24 hours before arrival, with reports also due at 72 hours. If you want to check what a line is planning rather than what the ship is broadcasting, our guide on ",[41,1155,1157],{"href":1156},"https:\u002F\u002Fprimonautic.com\u002Fblog\u002Fvessel-schedule-how-to-check-sailings-for-any-carrier","checking a vessel schedule"," walks through it carrier by carrier.",[26,1160,1162],{"id":1161},"eta-etd-etb-and-the-other-port-call-times","ETA, ETD, ETB and the Other Port Call Times",[11,1164,1165],{},"ETA is one of a family of timestamps that describe a port call. Once you know them, a schedule stops looking like alphabet soup. The definitions below follow the port call terms used in the IMO's Just In Time Arrival work.",[50,1167,1168,1181],{},[53,1169,1170],{},[56,1171,1172,1175,1178],{},[59,1173,1174],{},"Term",[59,1176,1177],{},"Full form",[59,1179,1180],{},"What it marks",[66,1182,1183,1194,1205,1216,1227,1238],{},[56,1184,1185,1188,1191],{},[71,1186,1187],{},"ETA",[71,1189,1190],{},"Estimated Time of Arrival",[71,1192,1193],{},"When the ship expects to reach the port or a set point",[56,1195,1196,1199,1202],{},[71,1197,1198],{},"ETB",[71,1200,1201],{},"Estimated Time of Berthing",[71,1203,1204],{},"When the ship expects to be alongside the berth",[56,1206,1207,1210,1213],{},[71,1208,1209],{},"ETC",[71,1211,1212],{},"Estimated Time of Completion",[71,1214,1215],{},"When cargo operations are expected to finish",[56,1217,1218,1221,1224],{},[71,1219,1220],{},"ETD",[71,1222,1223],{},"Estimated Time of Departure",[71,1225,1226],{},"When the ship expects to leave the berth",[56,1228,1229,1232,1235],{},[71,1230,1231],{},"ATA \u002F ATD",[71,1233,1234],{},"Actual Time of Arrival \u002F Departure",[71,1236,1237],{},"What really happened, recorded after the event",[56,1239,1240,1243,1246],{},[71,1241,1242],{},"RTA \u002F PTA",[71,1244,1245],{},"Requested \u002F Planned Time of Arrival",[71,1247,1248],{},"The slot the port asks for, often at the pilot boarding place",[11,1250,1251],{},"The gap between ETA and ETB is where most waiting happens. A ship can arrive on time and still sit at anchor for days because the berth is not free. For a cargo owner, ETB and ETD are often the more useful numbers, because unloading cannot start before berthing.",[11,1253,1254],{},"The IMO's GreenVoyage2050 portal defines ETD from the berth as depending on the completion of cargo operations and all other critical services, such as bunkers, provisions, waste disposal and clearances. So a late ETB pushes every time after it.",[26,1256,1258],{"id":1257},"why-a-ships-eta-changes","Why a Ship's ETA Changes",[11,1260,1261],{},"An ETA is a forecast, and like a weather forecast it gets revised as conditions change. The causes fall into a handful of groups.",[118,1263,1265],{"id":1264},"weather-and-sea-state","Weather and sea state",[11,1267,1268],{},"Head seas, strong winds and swell slow a ship down, sometimes sharply, and a master may also change course to avoid a storm. A ship that left on schedule can lose hours on an ocean crossing in bad weather, and the AIS ETA only reflects that once the bridge updates it.",[118,1270,1272],{"id":1271},"port-congestion-and-berth-availability","Port congestion and berth availability",[11,1274,1275,1276,1280],{},"When terminals are full, ships wait at anchorage, and the ETA to the berth slides even if the ETA to the port does not. The IMO estimates that ships spend up to 9% of their time waiting at anchorage. Our explainer on ",[41,1277,1279],{"href":1278},"https:\u002F\u002Fprimonautic.com\u002Fblog\u002Fport-congestion-why-ships-wait-and-how-to-plan","why ships wait at port"," covers how those queues form.",[118,1282,1284],{"id":1283},"schedule-reliability-across-the-industry","Schedule reliability across the industry",[11,1286,1287,1288,1293],{},"Late arrivals are not the exception. Sea-Intelligence measures how many container ships arrive on schedule each month, and its ",[41,1289,1292],{"href":1290,"target":44,"rel":1291},"https:\u002F\u002Fwww.sea-intelligence.com\u002Fpress-room\u002F410-global-schedule-reliability-continues-to-plummet-in-august",[46],"August 2026 report"," put global schedule reliability at 49.9%, the lowest since September 2022, amid severe port congestion in Asia. The average delay for late vessels reached 6.81 days, the highest level since March 2022.",[11,1295,1296,1299],{},[15,1297,1298],{},"In other words, roughly half of container ships missed their schedule that month, and the late ones were nearly a week late on average."," Even the most reliable top carrier, Maersk, was on time 67.3% of the time.",[118,1301,1303],{"id":1302},"route-changes","Route changes",[11,1305,1306],{},"Carriers also redesign routes mid-season. In October 2026 Xeneta reported that container capacity scheduled to transit the Red Sea had doubled in six weeks as lines returned to the Suez route. Every switch between the Suez Canal and the Cape of Good Hope moves the ETA of every ship on that service by days.",[118,1308,1310],{"id":1309},"human-factors-on-board","Human factors on board",[11,1312,1313],{},"Because the AIS ETA is typed by hand, it can simply be out of date. A ship that was delayed in port may keep broadcasting the original ETA until the next watch updates it. A 2025 review of vessel arrival prediction research also names crew competence and experience as fundamental to ETA accuracy, alongside unforeseen incidents during the voyage.",[26,1315,1317],{"id":1316},"just-in-time-arrival-when-ships-slow-down-on-purpose","Just In Time Arrival: When Ships Slow Down on Purpose",[11,1319,1320],{},"Some ETA changes are deliberate and good news. Under Just In Time Arrival, the port tells the ship when its berth and services will actually be ready, and the ship adjusts its speed to arrive at that time instead of rushing to wait at anchor.",[11,1322,1323],{},"The IMO's Global Industry Alliance published a Just In Time Arrival Guide in 2020 to give ports and shipping companies a shared process for this. The guide sets out which timestamps to exchange and when, including the requested time of arrival at the pilot boarding place.",[11,1325,1326,1327,1332],{},"The fuel savings are large. A study for the same alliance, reported by the International ",[41,1328,1331],{"href":1329,"target":44,"rel":1330},"https:\u002F\u002Fwww.ics-shipping.org\u002Fnews-item\u002Fcontainership-data-builds-business-case-for-jit-arrivals",[46],"Chamber of Shipping",", found container ships could save 14.16% of fuel per voyage when speed was adjusted over the whole trip. Applying it only in the last 24 hours still saved 5.90%, and 4.23% in the last 12 hours.",[11,1334,1335,1336,1339],{},"For you, the practical point is that ",[15,1337,1338],{},"a later ETA is not always a delay",". A ship that slows down to meet a confirmed berth slot may arrive at the berth at the same time as it would have after rushing and waiting, while burning less fuel on the way.",[26,1341,1343],{"id":1342},"how-eta-is-predicted-from-tracking-data","How ETA Is Predicted From Tracking Data",[11,1345,1346,1347,1352],{},"Because the broadcast ETA depends on the crew, tracking services and researchers also calculate their own. The basic method, as a 2025 review of ",[41,1348,1351],{"href":1349,"target":44,"rel":1350},"https:\u002F\u002Fwww.tandfonline.com\u002Fdoi\u002Ffull\u002F10.1080\u002F03088839.2025.2488376",[46],"arrival prediction studies"," describes it, is to predict the remaining travel time from the ship's current position and add it to the current time.",[11,1354,1355],{},"The inputs are mostly AIS data: position, speed over ground, course and heading, plus the route the ship is likely to take. Better models add weather, historical voyages on the same route, and port conditions. The same review notes that research in this area is still inconsistent in data, model choice and evaluation, so no single method is the standard.",[118,1357,1359],{"id":1358},"comparing-the-reported-and-calculated-eta","Comparing the reported and calculated ETA",[11,1361,1362],{},"The most useful view puts both numbers side by side. Primo Nautic shows the captain's reported ETA from AIS next to an AI-calculated route ETA, with a confidence score for the prediction. When the two drift apart, that gap is often the first sign that the ship is running late or that the AIS entry has not been updated.",[11,1364,1365],{},"Primo Nautic also flags detected delays and sends arrival and departure alerts, so you are not refreshing a map to find out whether the ETA has moved.",[26,1367,1369],{"id":1368},"how-to-read-a-vessels-eta-without-getting-caught-out","How to Read a Vessel's ETA Without Getting Caught Out",[11,1371,1372],{},"A few habits make any ETA more trustworthy, whether you read it on a tracking app, a carrier page or a port website.",[450,1374,1375,1381,1387,1393,1399,1405],{},[453,1376,1377,1380],{},[15,1378,1379],{},"Check the date, not just the time."," The AIS field has no year, and a past date means the entry has not been updated.",[453,1382,1383,1386],{},[15,1384,1385],{},"Convert from UTC."," Most maritime ETAs are in UTC, so add or subtract the local offset before planning around it.",[453,1388,1389,1392],{},[15,1390,1391],{},"Confirm the destination."," The destination field is entered by hand too; if it does not match the port you expect, the ETA is for somewhere else.",[453,1394,1395,1398],{},[15,1396,1397],{},"Compare two sources."," Set the ship's broadcast ETA against the carrier schedule or a calculated ETA, and treat a large gap as a warning.",[453,1400,1401,1404],{},[15,1402,1403],{},"Look past arrival to berthing."," For cargo, the ETB and the terminal's berth plan say more about pickup timing than the arrival time does.",[453,1406,1407,1410],{},[15,1408,1409],{},"Watch the trend."," An ETA that slips a few hours every day usually keeps slipping.",[11,1412,1413],{},"If you are following a loved one on board rather than a box, the same rules apply. Primo Nautic lets you choose why you are tracking, such as a loved one working at sea, and adapts its updates to that purpose, along with live weather at the ship's position, which often explains why an ETA has moved.",[26,1415,350],{"id":349},[11,1417,1418],{},"The ETA meaning in shipping is Estimated Time of Arrival, but the number behind it comes from different places. The ship's AIS ETA is typed in by the crew, stored without a year, and only as fresh as the last update. Carrier and port ETAs come from schedules and berth plans, and they shift with weather, congestion and route changes.",[11,1420,1421],{},"With schedule reliability around half in recent months and late ships running days behind, any single ETA deserves a second look. Read it in UTC, check the date and destination, compare it with another source, and remember that a slower, later arrival under Just In Time planning can still mean an earlier berth.",{"title":358,"searchDepth":359,"depth":359,"links":1423},[1424,1425,1429,1430,1437,1438,1441,1442],{"id":1093,"depth":359,"text":1094},{"id":1110,"depth":359,"text":1111,"children":1426},[1427,1428],{"id":1117,"depth":364,"text":1118},{"id":1146,"depth":364,"text":1147},{"id":1161,"depth":359,"text":1162},{"id":1257,"depth":359,"text":1258,"children":1431},[1432,1433,1434,1435,1436],{"id":1264,"depth":364,"text":1265},{"id":1271,"depth":364,"text":1272},{"id":1283,"depth":364,"text":1284},{"id":1302,"depth":364,"text":1303},{"id":1309,"depth":364,"text":1310},{"id":1316,"depth":359,"text":1317},{"id":1342,"depth":359,"text":1343,"children":1439},[1440],{"id":1358,"depth":364,"text":1359},{"id":1368,"depth":359,"text":1369},{"id":349,"depth":359,"text":350},"https:\u002F\u002Fmedia.primonautic.com\u002Fblog\u002Feta-meaning-in-shipping-who-sets-it-and-why-it-changes.jpg","ETA meaning in shipping explained: who enters a ship's ETA, how it differs from ETD and ETB, and why arrival times keep moving.",{},"\u002Fblog\u002F2026\u002F10\u002Feta-meaning-in-shipping-who-sets-it-and-why-it-changes","2026-10-25",{"title":1082,"description":1444},{"loc":1446},"blog\u002F2026\u002F10\u002Feta-meaning-in-shipping-who-sets-it-and-why-it-changes","ZwYefW1FW0vacZV5fosWyD4Rw78vmca-AnPnGRqzYXA",1794478488086]