Maritime Glossary

Source-cited definitions for shipping, engineering, navigation, and regulatory terminology. Confidence-scored and verified against primary IMO, IHO, and industry sources.

BIMCOBaltic and International Maritime Council
The world's largest international shipping association, producing standard contracts and clauses for the shipping industry.
commercialorganizationsstandardshigh confidence
Ballastballast water
Water taken on board a ship to provide stability and maintain safe trim when cargo spaces are empty or partially loaded.
operationsenvironmentengineeringhigh confidence
Ballast Water Management ConventionBWM Convention · BWMC
IMO convention requiring ships to manage ballast water to prevent the spread of invasive aquatic species.
regulationenvironmenthigh confidence
Bareboat Charterdemise charter
A charter under which the charterer takes full operational and navigational control of the vessel, including crewing and maintenance.
commercialcharteringhigh confidence
Beaufort ScaleBeaufort wind force scale
An empirical measure relating wind speed to observed sea and land conditions, numbered 0 (calm) to 12 (hurricane force).
navigationmeteorologyseamanshiphigh confidence
Berth
A designated place in a port where a vessel moors alongside a quay or pier to load, discharge, or receive services.
portsoperationscommercialhigh confidence
Bill of LadingB/L · BOL
A document issued by a carrier acknowledging receipt of cargo, evidencing the contract of carriage, and serving as a document of title.
commercialcargolegalhigh confidence
Biofoulinghull fouling · marine fouling
The accumulation of micro-organisms, algae, barnacles, and other organisms on a ship's underwater hull.
environmentengineeringoperationshigh confidence
Breakbulkbreak-bulk · general cargo
Cargo individually packaged or unitised (bags, bales, drums, crates) and loaded piece by piece, rather than in containers or as bulk.
cargooperationshigh confidence
Bulk Carrierbulker · dry bulk carrier
A cargo ship designed to carry unpackaged dry bulk commodities such as grain, coal, iron ore, and cement.
vessel-typescargohigh confidence
Bunkermarine fuel · bunker fuel · bunkering
Fuel used to power a ship's main engine and auxiliary machinery, or the act of taking on such fuel.
engineeringoperationsdecarbonizationhigh confidence