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Bow thruster
A bow thruster is a transverse propeller near a ship's bow that pushes water sideways, helping it berth and maneuver at low speed without tugs.
Brazilian submarine Álvaro Alberto
The Brazilian submarine Álvaro Alberto (S50, also SN-BR) is Brazil's planned nuclear-powered, conventionally armed attack submarine, first of a class of six under PROSUB, with launch planned for 2038.
Breakthrough (yacht)
Breakthrough is a 118.8-meter motor yacht built by the Dutch shipyard Feadship and delivered in 2025, the world's first superyacht with a working hydrogen fuel-cell system.
Breakwater (structure)
A breakwater is a fixed or floating structure built to protect a shore area, harbor, anchorage, or basin from waves, used for safe navigation, erosion control, and wave energy generation.
Brig
A brig, or sailing brig, is a two-masted vessel square-rigged on both masts, the smallest square rigger, widely used for cargo and naval service in the 18th and 19th centuries.
Brigantine
A brigantine is a two-masted sailing vessel, square rigged on the foremast and fore-and-aft on the mainmast, widely used for trade, privateering, and naval scouting from the late seventeenth through the nineteenth centuries.
Brilliant Lady
Brilliant Lady is an adults-only cruise ship, the fourth and final Lady Ship ordered by Virgin Voyages from Fincantieri, which entered service from New York City in September 2025.
British M-class submarine
The British M-class submarines were four Royal Navy monitor submarines of the First World War, each armed with a 12-inch gun plus four torpedo tubes.
British T-class submarine
The British T class, or Triton class, was a class of 53 diesel-electric patrol submarines built for the Royal Navy from 1937 to 1946, the largest ocean-going submarine class the Royal Navy ever had.
Brittany Ferries
Brittany Ferries (BAI Bretagne Angleterre Irlande) is a French ferry company founded in 1972 by Alexis Gourvennec in Roscoff, Brittany, linking France, the United Kingdom, Ireland, Spain, and Guernsey.
Broaching-to
Broaching-to is a sudden, uncontrollable turn of a ship in following or stern-quartering seas that continues despite maximum opposite rudder action, often causing a large heel angle and, in extreme cases, capsizing.
Brooklyn Navy Yard
The Brooklyn Navy Yard, officially the New York Navy Yard, is a Brooklyn shipyard established in 1801 that built the USS Arizona and USS Missouri.
Brooklyn-class cruiser
The Brooklyn-class cruiser was a class of nine United States Navy light cruisers built between 1935 and 1939, armed with fifteen 6-inch guns in five triple turrets and serving through World War II.
BRP Diego Silang (FFG-7)
BRP Diego Silang (FFG-07) is a Miguel Malvar-class guided-missile frigate of the Philippine Navy, built in South Korea and commissioned at Subic in December 2025.
BRP Miguel Malvar (FFG-6)
BRP Miguel Malvar (FFG-6) is the lead ship of the Miguel Malvar class of guided-missile frigates of the Philippine Navy, built in South Korea and commissioned in May 2025.
Buccaneer
A buccaneer, French boucanier, was a 17th-century Caribbean raider, originally a hunter on Hispaniola who smoked meat over a boucan, who later attacked Spanish shipping from havens like Tortuga and Port Royal.
Bulbous bow
A bulbous bow is a protruding bulb at a ship's front, at or just below the waterline, that reduces wave-making resistance; it is now common on large merchant ships.
Bulk carrier
A bulk carrier is a merchant ship that carries unpackaged dry cargo like iron ore, coal, and cement, with the modern type having developed since the late 1950s.
Bulkhead (partition)
A bulkhead, also called a partition bulkhead, is a partition wall that subdivides a ship's interior into compartments; watertight ones contain flooding after hull damage.
Buoy
A buoy is a floating, anchored object used as an aid to navigation, marking channels and hazards, with instrumented buoys also collecting weather and ocean data.
Burial at sea
Burial at sea, also called sea burial, is the disposal of a body or cremated remains in the ocean, practiced since the earliest days of seafaring.
Buyan-M-class corvette
The Buyan-M-class corvette (Project 21631, Russian: Буян-М) is a class of twelve small missile ships built for the Russian Navy, armed with Kalibr and Oniks missiles.
C and D-class destroyer
The C and D class were 14 destroyers built for the British Royal Navy in the early 1930s, several of which later served in the Royal Canadian Navy.
Cable ferry
A cable ferry, also called a chain ferry or rope ferry, crosses a waterway by pulling itself along a cable or chain fixed to both banks.
Cable layer
A cable layer, also called a cable-laying vessel or cable ship, is a specialized ship that installs, buries, and repairs submarine telecommunication and power cables on the seabed.
Canadian Coast Guard
The Canadian Coast Guard (CCG) is the civilian maritime service agency of Canada, created in 1962, responsible for search and rescue, icebreaking, and navigation aids.
Canadian Pacific Steamships
Canadian Pacific Steamships was the Canadian Pacific Railway's maritime arm, running Empress liners between Canada, Asia, and Europe from 1887, ending when TUI AG bought CP Ships in 2005.
Canadian Patrol Submarine
The Canadian Patrol Submarine Project is a Canadian defense procurement program to replace the four Victoria-class submarines with up to 12 under-ice capable boats, with Thyssenkrupp Marine Systems named preferred supplier in 2026.
Canoe
A canoe is a light, narrow watercraft pointed at both ends, propelled by facing paddlers using handheld paddles; canoes are among the earliest boats humans built.
Cape May–Lewes Ferry
The Cape May–Lewes Ferry is a passenger and automobile ferry service operated by the Delaware River and Bay Authority across the 17-mile mouth of Delaware Bay since 1964.