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.

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T/C or TC

Time charter

T/L

Total Loss

T/L

Total loss

T/P

Trans Pacific

T/S

Time Sheet or Transshipment

TA

Tanks or Transatlantic

TAC

Transatlantic Carrier Association

TAED

Tetraacetylethylenediamine. See Ethyleneamine

TAFHEX

Thursday afternoons Fridays and holidays excepted

Tail

Rear of a container or trailer–opposite the front or nose.

Tail

A protraction at the end of a feedstock or product's distillation curve. A wide spread between the 95 percent point and final boiling point of a stream. A heavy contaminant in a product. Less than ideal distillation can produce tails.

Tainting

Refers to a substance which is known to be taken up by marine organisms with the result that it is tainted and rendered unpalatable as seafood. Examples are chlorophenols. A taint is defined as "a foreign flavor or odor in the organisms induced by conditions in the water to which the organisms are exposed".

Taken Aback

A dangerous situation where the wind is on the wrong side of the sails pressing them back against the mast and forcing the ship astern. Most often this was caused by an inattentive helmsman who had allowed the ship to head up into the wind.

Taking turns

Changing watches with the turn of the hour glass.

Taking wind out of his sails

Sailing in a manner so as to steal or divert wind from another ship's sails.

Tall Oil

A by-product of the sulphite digestion of wood pulp for kraft paper manufacture. Tall oil is not a true fat or oil but consists of a natural mixture of 45 percent each of rosin acids and fatty acids and 10 percent unsaponifiable matter. The fatty acids are primarily oleic, linoleic, and linolenic acid.

Tallow

The rendered fat obtained mainly from beef carcass trimmings from the slaughter house. Some sheep fat may be included in commercial tallow, particularly in Australia and New Zealand. Tallow may be of edible or inedible quality. The latter is derived from lower quality raw materials. Inedible tallow is sold in a number of quality grades and is widely used in soap manufacture and as a source of fatty acids for the oleochemicals industry.

Tallyman

Controls the cargo going into and out of the vessel. Checks that volume and number tallies with the manifests

TAME

Tertiary-Amyl-Methyl-Ether

Tank Barge

Tank barges transport liquid cargoes like petroleum, petrochemicals and liquid fertilizers. Tank barges contain one or many tank compartments below deck with regulated temperature and pressure, depending on the cargo. Tank barges have special safety and security requirements. By the year 2015, all tank barges must be double-hulled.

Tank Cleaning Vessel

A vessel equipped to clean the tanks of other vessels and remove and transport slops

Tank Landing Craft

A combat vessel with strengthened bow ro-ro ramp for loading and discharge of tanks and other military vehicles

Tank Vessel (Tanker)

Ships which carry liquid products, such as crude petroleum, petroleum product, chemicals, liquid natural gas and molasses.

Tanker

A popular name for the tankships which carry bulk oil, oil products, chemicals, and other liquids in some cases.

Tanker

A seagoing vessel capable of carrying oil, gas or chemicals in bulk, whether it be a barge or ship.

Tanker (unspecified)

A tanker whose cargo is unspecified

Tankers

Ships fitted with tanks to carry liquid bulk cargo such as: crude petroleum and petroleum products, chemicals, Liquefied gasses (LNG and LPG), wine, molasses, and similar product tankers.

Tare Weight

In railcar or container shipments, the weight of the empty railcar or empty container.

TARPS

Tarpaulins

TARV

Trans atlantic round voyage

TARV (TA R/V)

Trans Atlantic Round Voyage

Taste

A subjective quality characteristic. It is not defined unambiguously and is evaluated differently by different people. It is mostly defined as the sense by which certain properties are perceived through the stimulation of the taste buds (the gustatory sense) when the food is chewed and comes in contact with the various areas of the tongue. The four basic tastes are salty, sweet, sour and bitter.

TBA

To Be Advised or To Be Agreed

TBD

To be declared

TBMA

To be mutually agreed

TBN

To Be Named or To Be Narrowed or To Be Nominated

TBN or TOBENA

To be Named; To be narrowed; To be Nominated

TBOOK

To the Best Of Owners Knowledge

TBR

To Be Renamed

TBR or TBRN or TRND

To Be Renamed

TBT

Tributyltin, used in tin-based antifouling

TC

Time charter. Owners agree to hire a particular ship for a set length of time and provide technical management, crewing etc.

TC

Tank Cleaning or Till Countermanded or Temperature Controlled (container)

TC-LO

Toxic Concentration Low. This is the lowest concentration of an airborne substance to which humans or animals have been exposed that resulted in any toxic effects in humans or produced any tumors or adverse reproductive effects in animals or humans

TCE

Time charter equivalent

TCH

Time charter hire

TCL

Tank Cleaning

TCM

Convention on the International Combined Transport of Goods

TCP

Time Charter Party. The document containing the terms and conditions of a contract between a charterer and a shipowner for the hire of a ship for a fixed time frame, usually more than one voyage.

TCT

Time charter Trip

TCV

Total Calcuated Volume

TCY

Time charter yield

TD-LO

Toxic Dose Low. The lowest dose of a hazardous substance introduced by means other than inhalation over a given time period that has been reported to produce toxic effects in humans or produced any tumors or adverse reproductive effects in animals or humans.

TDI

Tolune Diisocyanate. TDI is an isocyanate used in the production of polyurethanes for flexible foam applications ranging from furniture, bedding, and carpet underlay, to transportation and packaging. TDI is also used in the manufacture of coatings, sealants, adhesives, and elastomers

TDK or TWD

Tween Decker

TDW

Tons deadweight

TEA

Triethanolamine. See ethanolamine

TECH

Toxic, explosive, corrosive and hazardous (dangerous cargo)

Technical Management

Service where a hired agent operates a ship and receives a fee in return.

Technical Operator

"Technical Operator means an entity dealing with the responsibility for operation of the ship and which, on assuming such responsibility, has agreed to take over all the duties and responsibilities imposed by the ISM code and, where applicable, holds the Document of Compliance."

TELCON

Telephone Conversation

Telex

Used for sending messages to outside companies. Messages are transmitted via Western Union, ITT and RCA.Being replaced by fax and internet.

Temperature Recorder

A device to record temperature in a container while cargo is en route.

TEN

Trans European Network

Tender

The offer of goods for transportation or the offer to place cars or containers for loading or unload- ing.

Tenor

Time and date for payment of a draft.

TEPA

Tetraethylenepentamine

Teratogen

Causes physical defects in the developing embryo

Term Deal

An agreement for a customer, or lifter, to buy a supplier's oil over a period of time. Such arrangements obligate seller to provide and purchaser to take, and pay for, a named quantity of specified merchandise at a defined price over a number of months or years, usually according to some sort of schedule. The opposite of a spot deal.

Terminal

An area where a ship''s cargo is loaded or unloaded.

Terminal Buoy

A terminal buoy

Terminal Charge

A charge made for a service performed in a carrier’s terminal area.

Terms of Sale

The point at which sellers have fulfilled their obligations so the goods in a legal sense could be said to have been delivered to the buyer. They are shorthand expressions that set out the rights and obliga- tions of each party when it comes to transporting the goods. Following, are the thirteen terms of sale in international trade as Terms of Sale reflected in the recent amendment to the International chamber of Commerce Terms of Trade (INCOTERMS), effective July 1990: exw, fca, fas, fob, cfr, cif, cpt, cip, daf, des, deq, ddu and ddp.

Testicular toxicity

Causing injury to the testis; a specific subdivision of reproductive toxicity.

TEU

Twenty feet Equivalent Unit (or a container). A dry cargo container unit measuring 40 X 8 X 8.5 feet used as a measure of container capacity.

TF

Therefore

TFA

Trans Fatty Acids. TFA is naturally present in animal fats and are formed during the partial hydrogenation of oils. They are unsaturated fatty acids in which the hydrogen atoms attached to the carbon atoms in the double bond are on opposite sides of the double bond, whereas these hydrogen atoms are on the same side of the double bond in ""cis"" unsaturated fatty acids. The trans fatty acids have a relatively straight hydrocarbon chain, whereas ""cis"" fatty acids are bent at the point of the double bond. The difference in structures allows closer packing of molecules of trans fatty acids and triglyceride molecules which contain them. Consequently, the trans fatty acids and their triglycerides have higher melting points than the corresponding ""cis"" fatty acids and their triglycerides.

TFDE Propulsion

Tri-Fuel Diesel Electric Propulsion - The name TFDE originates mainly due to the power generation engines being able to use three different types of fuel, thus the name "tri-fuel diesel electric propulsion." These are specifically used in LNG carriers.

TFW

Tropical fresh water loadline

TG

Tug

THC

Terminal Handling Charges

The Bitter End

The end of an anchor cable is fastened to the bitts at the ship's bow. If all of the anchor cable has been payed out you have come to the bitter end.

The Devil to Pay

To pay the deck seams meant to seal them with tar. The devil seam was the most difficult to pay because it was curved and intersected with the straight deck planking. Some sources define the "devil" as the below-the-waterline-seam between the keel and the the adjoining planking. Paying the Devil was considered to be a most difficult and unpleasant task.

Theatre Vessel

A mobile vessel used as a theatre

Thermal Cracker

Originally, the name of the refining industry's first molecule breaker. These units used heat and pressure to turn heavy fuel oil into gasoline and distillate. Today, the term applies to a category of bottoms crackers, including visbreakers and cokers, which rely on heat to destroy residue.

Thermal cracking

Thermal cracking is a petroleum refining process used to break up heavy oil molecules into lighter, more valuable fractions (e.g. gasoline, kerosene) by the use of high temperature without the aid of catalysts. It is used to convert gas oils into naphtha.

Thermal Stability

Reluctance to change, especially to deteriorate, when heated. A property particularly associated with aviation turbine fuels.

Thermoforming

The process of heating a thermoplastic sheet to a working temperature and then forming it into a finished shape by means of heat or pressure. (Modern Plastics Encyclopedia 1995)

Thermoplastic

A plastic which is solid when cold, but which may flow and be re-formed multiple times with the application of heat. Some plastics are dissolved in solvents such as water (a latex) to aid their application.

Thermoset

A polymer that solidifies when heated, in other words it sets and cannot thereafter be changed, is called a thermoset. Some polymers behave like this because the heating process causes the chains of the polymer to bind to each other, via cross-links, and these cannot then be broken. Polymers that remain malleable after heating and cooling are referred to as thermoplastics. Polymers of this kind can also be cross-linked by the addition of certain cross-linking agents and turned into rigid materials.

Third Party Logistics (3PL)

A company that provides logistics services to other companies for some or all of their logistics needs. It typically includes warehousing and transportation services. Most 3PL’s also have freight forwarding licenses.

Third-Party Processing

see TOLL PROCESSING

THP

Thrust horse-power

THR

THRuster

Three Sheets to the Wind

A sheet is a rope line which controls the tension on the downwind side of a square sail. If, on a three masted fully rigged ship, the sheets of the three lower course sails are loose, the sails will flap and flutter and are said to be "in the wind". A ship in this condition would stagger and wander aimlessly downwind.

Through Rate

The total rate from the point of origin to final destination.

Throughput Charge

The charge for moving a container through a container yard off or onto a ship.

Thwartships

At right angles to the centre-line of the ship

TIB

Trimmed in bunkers

Tide

The periodic rise and fall of water level in the oceans
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