Sailors sleep in designated sleeping quarters called “berthing compartments” on military vessels, private cabins on merchant ships, or shared crew cabins on cruise ships. The specifics vary dramatically depending on the type of vessel, the sailor’s rank, and how many people the ship needs to squeeze onboard. On a Navy warship, that might mean sharing a room with 50 or more people. On a modern cargo ship, it could mean having a cabin to yourself.
Enlisted Berthing on Navy Ships
On U.S. Navy warships, most enlisted sailors sleep in large open compartments fitted with rows of bunks called “racks.” These racks are stacked three high (sometimes four) and held up by metal posts and chains. Each rack consists of a metal frame with stretched canvas or a pan supporting a thin mattress, made up with white sheets and a gray blanket. The space between one rack and the next is minimal, often just enough to roll over without bumping the rack above you.
A single berthing compartment might house anywhere from 33 sailors in a smaller space to 180 in the large open berthings on aircraft carriers, sometimes nicknamed “gen pop.” Sailors in these compartments share a small number of toilets and showers for the entire group. Storage is limited to a locker beneath or beside the rack. Standard Navy berths measure roughly 79 inches long by 28 inches wide, and the under-mattress storage locker provides the only personal space many sailors have for all their belongings.
How Officers Sleep Differently
Rank changes the equation considerably. Commissioned officers typically sleep in “staterooms,” which are small shared rooms housing two to six people. Junior officers on carriers often live in bunk rooms similar to enlisted berthing, just smaller in scale. More senior officers get staterooms shared with one or two others, and the most senior (typically the rank of captain and above) may have a private stateroom with its own bathroom.
Female officers on some ships have had particularly favorable arrangements: a stateroom shared with just one other officer, plus access to a private bathroom shared among a small group. Officers also eat in the wardroom, where they’re served meals at a table rather than standing in a cafeteria line. The gap between enlisted and officer living conditions is one of the most consistent features of naval life across centuries and navies.
Sleeping on Submarines
Submarines take the space problem to an extreme. A typical U.S. attack submarine carries 150 to 170 crew members in a sealed pressure hull with limited room for bunks. Because there aren’t enough racks for everyone, submarines use a system called “hot racking,” where two or three sailors share the same bunk on a rotating basis. When one person finishes a shift and gets up, the next person climbs in.
The crew is divided into three watch sections, each rotating through six-hour cycles. Someone is always asleep on a submarine, and someone is always about to need that bed. The nickname “hot racking” comes from the fact that the mattress is still warm from the last person.
Watch Schedules and When Sleep Happens
Sailors don’t sleep on a normal nighttime schedule. Navy ships operate 24 hours a day, and crew members rotate through watch periods that dictate when they work, eat, and sleep. On some rotations, a sailor’s sleep gets split into two separate blocks rather than one continuous stretch. Others work a night shift and sleep through the morning.
The Navy has moved toward “circadian-based watchbills” that try to align sleep schedules with a consistent 24-hour rhythm, letting sailors sleep and wake at roughly the same time each day. These schedules designate “protected sleep” periods when off-duty sailors shouldn’t be disturbed by meetings, training, or drills. In practice, calling off-watch personnel while they’re sleeping is officially listed as a “worst practice,” though it still happens.
The goal is at least seven hours of sleep per day, but the environment works against it. A study of sleeping areas on an aircraft carrier found that 72% of all noise measurements exceeded the threshold considered “effective quiet” for hearing recovery, and every single measurement exceeded the World Health Organization’s threshold where noise begins to disrupt sleep. Berthing compartments near the middle or forward sections of the ship were about 15 decibels louder than those toward the stern. During flight operations, noise levels jumped another 6 decibels in sleeping areas. Sailors often sleep with earplugs and eye masks as standard equipment.
From Hammocks to Bunks
For most of naval history, sailors didn’t sleep in bunks at all. The Royal Navy adopted hammocks in the 1590s after encountering them in the Caribbean, and they remained the standard sleeping arrangement for over 350 years. A hammock swings with the ship’s motion rather than fighting it, takes up almost no space when lashed and stowed, and can be hung practically anywhere below deck. Navies didn’t fully phase out hammocks until after the Second World War, when fixed berths became standard on newer vessels.
Merchant Ships and International Standards
Crew on commercial cargo ships and tankers live under international labor rules that guarantee far more personal space than a naval warship provides. Regulations implementing International Labour Organisation conventions require that each crew member get their own sleeping room when the ship’s size and layout make it practicable. Officers are guaranteed a single-occupancy cabin.
Minimum cabin sizes depend on the ship’s tonnage. For a single crew member on a ship over 10,000 tons, the floor area must be at least 4.75 square meters (about 51 square feet). For a two-person cabin on the same ship, each occupant gets at least 3.75 square meters. Officers without a separate day room get larger quarters: 7.5 square meters on ships over 3,000 tons. These aren’t spacious by any standard, but compared to a Navy rack stacked three high in a room with 50 other people, it’s a significant upgrade.
Cruise Ship Crew Quarters
Cruise ship crew members sleep in small cabins typically located on the lowest decks, well below the passenger areas and often below the waterline. Depending on the ship and the crew member’s role, these cabins might be shared with one or two other people, or occasionally assigned as a single. Entertainment staff and officers tend to get better accommodations than housekeeping or kitchen staff. The cabins are compact but usually include a small bathroom, a desk or shelf, and a closet. They’re a step up from military berthing but still far smaller than the passenger cabins a few decks above.