Maritime Terms, Abbreviations and Acronyms

Maritime abbreviations and acronyms go back to those days we used telegram and telex to communicate. The business model for telex and telegrams was “pay per letter”. Even though the telegrams and telexes have been retired, we still use the maritime abbreviations daily.

Below you will find a comprehensive list of terms, abbreviations, and acronyms used in the maritime industry, sorted in alphabetical order. You can search for an acronym or write a word and find the abbreviations where the word is included.

If you think some abbreviations are missing, send us an e-mail at post@maritimeoptima.com or open the chat icon on the bottom of this page.

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Blender

someone or some organization which combines various components to produce motor gasoline. The term may accurately apply to refiners for they blend motor fuel from blendstock they produce or purchase. In many cases, however, the word designates gasoline makers who do not refine any crude oil and distinguishes them from the "refiners" who do.

Blendstock

A component combined with other materials to produce a finished petroleum product. The term applies most frequently to motor gasoline ingredients.

Blepharitis

Inflammation of the eyelids

BLG

Bulk Liquids and Gases

Blind Shipment

A B/L wherein the paying customer has contracted with the carrier that shipper or consignee infor- mation is not given.

BLK

Bulk

Block Stowage

Stowing cargo destined for a specific location close together to avoid unnecessary cargo movement.

Blocked Trains

Railcars grouped in a train by destination so that segments (blocks) can be uncoupled and routed to different destinations as the train moves through various junctions. Eliminates the need to break up a train and sort individual railcars at each junction.

Blocking or Bracing

Wood or metal supports to keep shipments in place to prevent cargo shifting. See also Dunnage.

BLS

Bales or barrels

BLSEA

Baltic Sea

BLST

Ballast

Blt

Built

BLY

Barley

BM

(Beam) breadth moulded or Board measurement

BM

Ship Stability: Symbol for transverse metacentric radius; distance between B and M.

BMF

Board measurement feet = 1' x 1' x 1''

BMM

British Marine Mutual

BO

Bad Order or Branch Office

BO or BOFFER

Best Offer

BOA

Berthing on arrival

Board

To gain access to a vessel.

Board Feet

The basic unit of measurement for lumber. One board foot is equal to a one–inch board, 12 inches wide and 1 foot long. Thus, a board 10 feet long, 12 inches wide, and 1 inch thick contains 10 board feet.

Boat

A relatively small, usually open craft/vessel a small, often open vessel for traveling on waterAn inland vessel of any size.

BOB

Bunker on Board

Bobtail

Movement of a tractor, without trailer, over the highway.

BOC

Bulk Oil Carrier

BOD

Board of Directors

BOD APP

Board of directors approval

BOFFER

Best Offer

BOFFERS

Best offers

Bogie

A set of wheels built specifically as rear wheels under the container.

Boiling range

The temperature spread between the points where a material starts and finishes evaporating. This term has an abstract usage- naphtha-range, for example. It also has a specific one, such as "naphtha with a 140-350 F range."

Bollard pull

The thrust developed at zero ahead speed. Bollard pull is the most commonly used measure of ship-assist tugs performance which have propellers optimized for maximum thrust at close to zero speed.

Bolster

A device fitted on a chassis or railcar to hold and secure the container.

Bond

Linkage between atoms which holds together molecules. The basic bond involves two atoms connected by a pair of shared electrons. A double bond requires linkage by two pairs (four electrons). A triple bond puts six electrons between two atoms.

Bond Port

Port of initial Customs entry of a vessel to any country. Also known as First Port of Call.

Bonded Freight

Freight moving under a bond to U.S. Customs or to the Internal Revenue Service, to be delivered only under stated conditions.

Bonded Warehouse

A warehouse authorized by Customs authorities for storage of goods on which payment of duties is deferred until the goods are removed.

Booby Hatch

Aboard ship, a booby hatch s a sliding cover or hatch that must be pushed away to allow access or passage.

Booking

Arrangements with a carrier for the acceptance and carriage of freight; i.e., a space reservation.

Booking Number

Reservation number used to secure equipment and act as a control number prior to completion of a B/L.

Boom defence Vessel

A naval vessel for laying harbour defence booms

BOR

Bunkers on Redelivery

BORD.ARB.

Bordeaux arbitrary

BORO

Bulk, Oil and roll-on, roll-off vessel

BOSP

Beginning Of Sea Passage

Bottom Side Rails

Structural members on the longitudinal sides of the base of the container.

Bottom wash

Crude oil washing operations restricted to the lower parts of the tank bulkheads, internal structures and bottom of tanks. This can only be carried out by vessels equipped with programmable tank washing machines.

Bottom–Air Delivery

A type of air circulation in a temperature control container. Air is pulled by a fan from the top of the container, passed through the evaporator coil for cooling, and then forced through the space under the load and up through the cargo. This type of airflow provides even temperatures.

Bottoms

Unvaporized material drawn from the lowest point of a fractionation column.

Bow

Forward most point of a ship.

Bow Thruster

a device built into, or mounted to, the bow of a ship to make it more maneuverable.

BOX

Term used for a container or boxed vessel

Boxcar

A closed rail freight car.

BP

Boiling Point

BPA

Bisphenol A. An industrial chemical used to make polycarbonate plastic used for structural parts, impact-resistant glazing, street-light globes, household appliance parts, components of electrical/electronic devices, compact discs, automotive applications, reusable bottles, food and drink containers, and many other products. It is also used in the production of epoxy resins for coatings, food and beverage can linings, electrical laminates, composites and adhesives, and in other products.

BPA Bisphenol-A

(4,4'-isopropylidenediphenol) An intermediate used in the production of epoxy, polycarbonate and phenolic resins. The name was coined after the condensation reaction by which it may be formed-two (bis) molecules of phenol with one of acetone (A). (Whittington's Dictionary of Plastics, published by Technomic Publishing)

BPB

Bank post bill

BPC

British Phosporous Commission

BPG

International Chamber of Shipping Bridge Procedure Guide

BPI

Baltic Panama Index

BPQ

Barge Particulars Questionnaire

BR

Boiler Room

BR

Bulgarian Register of Shipping or Brazil or Builder's risk

Br.ld.

Break load (a) To unload and distribute a portion or all of the contents of a rail car, container, trailer, or ship (b) Loose, non–containerized mark and count cargo (c) Packaged cargo that is not containerized.

Breakbulk

Breakwater

Structures designed to provide shelter from waves and improve navigation conditions. Such structures may be combined with jetties where required (EM 1110-2-2904).

BREF

BAT Reference Documents, prepared by a European IPPC Bureau in Seville, in which BATs are defined. See BAT.

Brent

The most commonly traded North Sea crude oil. Technically, it is a mix of crude from the UK Brent field and the Ninian field.

BRGDS

Best Regards

Bridge Point

An inland location where cargo is received by the ocean carrier and then moved to a coastal port for loading.

Bridge Port

A port where cargo is received by the ocean carrier and stuffed into containers but then moved to another coastal port to be waded on a vessel.

Bright annealing

Annealing in inert gas or vacuum to minimize oxidation of the surface

BRKR or BRKRS

Broker(s)

BRKRS

Brokers

BRM

Bridge Resources Management

BROB

Bunkers Remaining on Board

Broken Stowage

The loss: The loss of space caused by irregularity in the shape of packages. Any void or empty space in a vessel or container not occupied by cargo. Space caused by irregularity in the shape of packages.

Broker

A person who arranges for transportation of loads for a percentage of the revenue from the load.

Brokerage

Freight forwarder/broker compensation as specified by ocean tariff or contract.

Bromine number

A measure of the olefins content of a hydrocarbon mixture. In the petroleum intermediates trade, it serves primarily to indicate the presence of cracked stock in a cargo or stream. California air pollution laws also make it an important specification for motor gasoline and blendstocks offered in Los Angeles. As a rule-of-thumb, a mixture's bromine number equals roughly twice its olefin content.

BRT

Brutto register tons or Gross register tons

BS

Broken Stowage or Balance Sheet

BS/L

Bills of lading

BSA

British Shipbrokers Association

BSC

British Shippers Council

BSEA

Black Sea

BSG

Barge Safety Guide

BSI

British Standards Institution

BSS

Basis

BSS 1/1

Basis 1 port to 1 port

BST

British Summer Time, British Standard Time

BT

Berth Terms or Bow Thruster

BT

Bow Thruster room

BTD

Butadiene

BTU

British Thermal Unit - 0.252 kcal or Bow Thrust Unit

BTX

Abbreviation of the aromatic hydrocarbons, benzene, toluene and xylene

BTX extraction

A solvent recovery process for capturing benzene, toluene, and xylenes from refinery and petrochemical plant process streams (reformate and pyrolysis gasoline.)

BU

Bushel
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