Merchant Marine Salary: 9 Ranks and What They Pay

A merchant marine salary in the United States runs from roughly USD 34,560 a year at the bottom of the deck department to more than USD 170,640 for the best paid licensed officers. Rank explains most of that spread. Days worked, vessel type, flag and whether the job sits under a union contract explain the rest.

This guide follows the ladder in the order careers actually climb it, nine positions from ordinary seaman to chief engineer. Each one covers what the job involves, what published wage data supports, and what moves pay inside that rank.

Start with a warning about the numbers you will find elsewhere. No public dataset reports pay by shipboard rank. Statistical agencies group tens of thousands of jobs into three broad occupations, so any page quoting a precise figure for "second mate" has estimated it. This guide keeps published figures and estimates separate, and says where the data runs out.

What a Merchant Marine Salary Actually Measures

Two pay systems sit behind the same phrase, and mixing them is why the figures online vary so wildly.

The first is international. Most of the world fleet sails under open registries and hires from a global labour market, with pay anchored to a negotiated floor rather than a national wage. The International Labour Organization raised that floor for an able seafarer from USD 673 to USD 690 a month on 1 January 2026, with agreed steps to USD 704 in 2027 and USD 715 in 2028. That is a minimum basic wage, not a typical one, and real contracts add overtime, leave pay and bonuses on top of it.

The second is national. Across all United States water transportation workers, the median annual wage was USD 71,860 in the May 2025 wage survey, which is the same release the table below draws on.

Comparing a monthly rate under an international agreement against an annual American salary compares two labour markets, not two ranks.

The Three Buckets Every Rank Figure Comes From

Federal wage statistics split shipboard work into three occupations. Almost every per-rank number published anywhere traces back to one of them.

These are United States national estimates from that May 2025 survey, the most recent release. It counts 79,400 jobs across the water transportation group, of which these three occupations hold 76,920 and motorboat operators the rest. The survey covering captains and mates counts everyone from harbour launch operators to deep sea masters, which is why its range is so wide, while ship engineers post a higher median on a far smaller headcount than sailors and oilers.

1. Ordinary Seaman

The ordinary seaman is the unlicensed entry rank on deck. The work is chipping, painting, mooring lines, lookout duty and whatever the bosun assigns, and it needs no degree, only a merchant mariner credential and basic safety training.

Pay sits at the bottom of the sailors and marine oilers band, which starts at USD 34,560 at the tenth percentile. Entry rates are the most compressed in the whole ladder because the role is defined by having no certificate yet.

What lifts the number early is the trade rather than the title. In the same survey, sailors working deep sea, coastal and Great Lakes routes averaged USD 64,390 against USD 53,430 on inland waterways. A first job on an ocean going ship pays differently from a first job on a river tow, before anyone gets promoted.

The band is compressed at the bottom for the same reason. Its twenty fifth percentile is USD 41,430, under USD 7,000 above the tenth, so the bottom of the deck department is packed into a narrow band and very little inside it responds to negotiation.

The other lever is sea time. Ordinary seaman is a counting rank, and the days logged in it are the currency that buys the next certificate. Nobody is promoted out of it early, because the requirement is written in days of qualifying service rather than in performance, and a rotation that keeps a mariner aboard for more of the year buys that certificate sooner.

2. Able Seaman

Able seaman is the first rank with a real certificate behind it. It requires documented sea service, an endorsement, and on tankers a tankerman qualification. The duties add helmsman work, watchkeeping and responsibility for gear rather than just labour.

This is also the rank the international pay system is built around. The ILO floor of USD 690 a month applies specifically to an able seafarer, and every other rank on an internationally negotiated wage scale is calculated as a differential above it.

In the American figures the able seaman sits in the middle of the sailors and marine oilers band, around the USD 51,520 median rather than the USD 34,560 entry. The gap between an ordinary and an able seaman is the clearest pay return on any single certificate in the merchant marine.

The differential structure is worth understanding on its own. Because the international scale is anchored to the able seafarer rate, a rise in that floor pulls the ranks above it along too, which is why the agreed steps to USD 704 in 2027 and USD 715 in 2028 matter to officers who will never be paid a minimum. On an American ship the same rank is priced by the domestic labour market instead, and the two figures should never be added together.

Overtime matters more here than anywhere else on deck, because able seamen are the crew most often called for cargo watches and mooring outside normal hours.

3. Bosun

The bosun is the senior unlicensed rating on deck, the working foreman who takes the chief mate's plan and turns it into a day's work for the deck gang. It is a supervisory job without a licence.

Pay reflects that, sitting near the top of the unlicensed band and reaching towards the USD 83,620 ninetieth percentile on the better paying vessels. The bosun is usually the highest earning person on the ship who is not an officer.

The rank matters for a reason beyond money. It is where many mariners decide whether to stay unlicensed for a full career or spend the time and cost on an officer licence. The pay ceiling of the deck gang is visible from here, and it is roughly half of what the deck officers above it can reach.

The pay case for staying unlicensed rests on that ceiling. The seventy fifth percentile for the occupation is USD 67,590, so a bosun on a well paying vessel is already earning more than three quarters of the deck ratings in the country, and the distance left to the top of the band is short. Everything past it needs a licence rather than another year of service.

If the ranks and their reporting lines are new to you, our guide to every position on board sets out how the departments fit together.

4. Third Mate

The third mate is the first licensed deck officer, standing a navigational watch alone and usually carrying responsibility for the ship's lifesaving appliances. The route in is either a maritime academy degree or accumulated sea time plus examinations.

The step into the licensed band is the single largest jump in the ladder. Unlicensed deck pay has a median of USD 51,520, while the captains, mates and pilots occupation has a median of USD 92,460 and a tenth percentile of USD 47,420. A new third mate typically enters in the lower part of that officer range rather than at its median.

The overlap at that boundary is the part worth reading carefully. The unlicensed band reaches USD 83,620 at its ninetieth percentile while the officer band opens at USD 47,420, so the two ranges cross over a long stretch and an experienced bosun can out earn a first trip third mate. What the licence buys is not an immediate raise but access to the rest of the officer distribution, whose twenty fifth percentile alone is USD 63,880.

What decides the starting figure is the employer. Academy graduates going deep sea under an American flag start meaningfully higher than officers entering on smaller coastal or harbour vessels, and both fall inside the same statistical bucket.

5. Second Mate

The second mate holds the navigation watch that most people picture when they think of the bridge, and traditionally owns passage planning and the charts. On many ships the rank also carries the medical officer role.

Pay moves up from third mate by a step rather than a leap, generally landing between the officer median of USD 92,460 and the seventy fifth percentile of USD 127,180, depending on the trade. The promotion is driven by sea time and endorsement rather than by a vacancy on a particular ship.

Second mate is also where specialisation starts paying. Tanker endorsements, dynamic positioning tickets and ice navigation experience all attract premiums, because the pool of officers holding them is smaller than the number of ships needing them.

Sea time is the constraint here rather than ability. Every licence step is written in days of qualifying service, so the calendar sets the pace at which a second mate can move on, and the years spent in the rank are years of collecting both that service and the endorsements that decide where in the officer band the next contract lands. The band is wide enough for that to matter: USD 63,880 at the twenty fifth percentile against USD 127,180 at the seventy fifth, a spread of more than sixty thousand dollars inside one occupation.

The role suits people who want technical depth before management responsibility, and it is often the longest rank in a deck career.

6. Chief Mate

The chief mate is second in command and runs cargo operations, stability, maintenance and the deck crew. On a loaded tanker or a container ship working a tight port rotation this is the most operationally demanding job on board.

Chief mates sit in the upper part of the licensed officer range, working towards the USD 127,180 seventy fifth percentile and past it on specialised vessels. The rank is one qualifying voyage away from command, and pay is close enough to a master's to reflect that.

The premium here is for accountability rather than hours. A cargo error at this level costs a shipowner more than a year of the officer's salary, which is why the endorsement takes so long to earn.

Vessel type decides how far above the median the job lands. The occupation's median is USD 92,460 and its seventy fifth percentile USD 127,180, a gap of nearly USD 35,000 that is filled by tankers, gas carriers and the offshore trades rather than by seniority. A chief mate on a clean products tanker and a chief mate on a small coastal freighter hold the same certificate and not the same job.

Geography compounds it. Officers based in Louisiana averaged USD 119,980 and those in Texas USD 112,180, against USD 84,720 in Florida, because the offshore energy and tanker trades concentrate in the Gulf.

7. Master

The master carries legal command of the vessel, and the responsibility does not divide. Everything from safety and crewing to cargo, pollution and port state compliance ends at this rank.

Masters occupy the top of the captains, mates and pilots distribution, above the USD 127,180 seventy fifth percentile and into the USD 170,640 ninetieth. The very highest earners in that bucket are generally harbour pilots and masters on specialised vessels rather than typical deep sea captains.

Vessel size and trade matter more than seniority at this level. A master on a large tanker or a car carrier is paid for the value and risk of the hull and cargo, not for years served.

The shape of the distribution is a warning in itself. The occupation's ninetieth percentile is USD 170,640 against a median of USD 92,460, so the distance between a typical captain and a well paid one is larger than the distance between a typical captain and an officer at the USD 47,420 bottom of the licensed band. Command is not one salary, it is a range wider than most careers ever cover.

For anyone weighing the full route to this rank, our guide on how to become a seaman covers the certificates and sea time each step demands.

8. Assistant Engineer

The engine department runs a parallel ladder, and it starts with the third and second assistant engineer. These officers stand engine watches, maintain machinery and handle the fuel, lubrication and cooling systems the ship cannot sail without. The licence route mirrors the deck one, through an academy or through sea service and examinations.

Assistant engineers sit in the lower half of the ship engineers band, which begins at USD 57,870 at the tenth percentile against a median of USD 109,530. That entry point sits above the USD 47,420 tenth percentile for licensed deck officers, and far above the USD 34,560 floor for unlicensed deck ratings.

Only 8,400 people hold this occupation in the United States, roughly a quarter of the deck officer count. Small supply against steady demand is what keeps the engine room's floor high.

The band is steep as well as high. Its twenty fifth percentile is USD 82,130 and its seventy fifth USD 135,760, so an assistant engineer who stays in the department is climbing one of the widest quartile ranges in the whole survey, and the climb comes from endorsements and vessel type rather than from a change of title.

Dual licences, gas fuel endorsements and experience with newer propulsion systems all raise the number further, and those qualifications are becoming more common requirements as fleets change fuel.

9. Chief Engineer

The chief engineer is the master's counterpart below decks, accountable for every machinery system on the ship and for the budget that keeps them running.

Chief engineers reach the top of their band, approaching and passing the USD 165,490 ninetieth percentile on complex vessels. That ceiling sits just below the USD 170,640 ninetieth percentile for captains, mates and pilots, while the engineering median of USD 109,530 stands well clear of the deck median of USD 92,460. A typical engineering career out earns a typical deck career even though the very top of the deck side still reaches higher.

Two things separate the top of the band from its middle. The first is budget. A chief engineer signs off spares, lubricants, fuel treatment and the scope of a dry docking, and those sums dwarf the salary attached to the signature. The second is the certification for periodically unattended machinery spaces, which lets a ship run its engine room overnight without a watchkeeper and puts the consequences of a missed fault on the person who signed the maintenance record.

The rank rewards diagnostic judgement that cannot be replaced at sea. A chief engineer who avoids one unplanned stoppage has justified the salary difference over an assistant for the whole year.

Days Worked Matter as Much as Rank

Annual figures hide the biggest variable in seafaring pay, which is how much of the year the job actually covers.

Published annual wages assume a full time year. Merchant mariners work rotations instead, and a common deep sea pattern is roughly equal time on and off. Some contracts pay only for days aboard, some spread an annual salary across the whole year, and two officers of the same rank can end up with very different bank balances on the same day rate.

Before comparing any two merchant marine salaries, confirm whether each figure is a day rate, a pay period total or an annual salary, because the same job can be described in all three ways.

Rotation length is also the part of the job families feel most. Knowing when a contract ends means knowing where the ship is and how the voyage is running, which is why crews and their families use tools such as Primo Nautic to follow a vessel's position, weather and arrival estimate between messages home.

Vessel Type and Flag Change the Number

Two officers with identical certificates can be paid very differently depending on what they sail and under which register.

• Trade. Deep sea, coastal and Great Lakes sailors averaged USD 64,390 against USD 53,430 on inland routes in the same survey.
• Cargo. Tankers and gas carriers pay premiums that dry cargo ships do not, because the endorsements are harder and the liability larger.
• Register. National flag employment carries national wage law, while open registry employment is governed by the contract and the negotiated minimum.

Working out which category a job belongs to is easier than it sounds, because a vessel's type, size and trading pattern are visible from its live track. Primo Nautic identifies what a ship is and where it works, which turns a company name in a job advert into a concrete picture of the rotation behind it.

The Officer Shortage Behind Rising Pay

Pay at the officer end is under upward pressure for a structural reason. A joint BIMCO and ICS report published in June 2026 counts 2.57 million seafarers operating 85,148 merchant ships, and forecasts a shortage of 39,100 certified officers during 2026 alongside a surplus of 56,890 ratings.

That split is the whole story of the ladder in one statistic. Unlicensed ranks compete against an oversupply, while licensed ranks are scarce and getting scarcer. The same report projects a need for 113,735 additional officers by 2030, with demand for certified seafarers up 35 percent since 2021.

The American picture agrees at a smaller scale. Employment of water transportation workers is projected to grow 4 percent between 2025 and 2035, with about 8,600 openings a year, most of them replacing people who retire or move ashore.

Key Takeaways

A merchant marine salary is set first by whether the job sits in the unlicensed or the licensed band, and the distance between those two bands is larger than any promotion inside either one. Unlicensed deck work has a median of USD 51,520 and a ceiling near USD 83,620, while licensed officers have a median of USD 92,460 and reach USD 170,640 at the top.

The engine department starts higher and holds a higher median than the deck department, on roughly a quarter of the headcount. That scarcity is the reason, and the projected officer shortage suggests it will hold.

Everything else is context that can move a figure by tens of thousands: the trade, the cargo, the flag, the endorsements and, most of all, how many days of the year the contract actually pays for. Treat any single number as a starting point and check what it includes before you compare it with another.