Time lost waiting for berth to count as loading/discharging time or "as laytime". This clause, which is found in the GENCON voyage charterparty, relates to the commencement of laytime. Basically, it:

Tally. Upon delivery of cargo, the number of packages is checked by tally clerks. The information on tally clerks’ sheets is inserted on the mate’s receipts and bills of lading.

Trim. The trim of a vessel is the difference between the draughts fore and aft. If the draught fore and aft is the same, the vessel is “in trim” or “on even keel”.

TBN. This abbreviation can be found in reports of fixtures and stands for "to be nominated". It usually refers to the name of a vessel that is not yet named by the owner.

Terms. The essence of any contract, for example, a contract of carriage, is that each party to the contract has certain obligations to the other.

Turn. This refers to the sequence in which a vessel is available for laytime when other vessels are meant to use the same cargo-handling berth or when cargo is available.

TEU (Twenty-foot equivalent unit). This is the space that would be occupied by a container having the international ISO standard external dimensions, one of which, the length, is 20 feet or 2.4 metres.

Tariff. This is the list of freight rates, surcharges and other charges and terms and conditions of carriage of goods. It can also be called the “rate book” and is generally published by a liner conference or even by independent liner operators.

Ullage. This is a measurement of space between the surface of liquid in a tank and the top of the tank inner surface.

Trade terms and INCOTERMS are not exclusively used in shipping as, for example, are charterparties.

Termination of cover - Hulls. In cargo insurance, once the insurance cover has attached, the cover cannot be withdrawn at the option of the underwriter.

Unless used. This phrase refers to the counting of laytime against a charterer and the exceptions to laytime such as Sundays and holidays.

Tallying. This is the recording of cargo coming into and going out of a ship (or warehouse, or container.)

Tarpaulins. In older, general cargo ships, before proceeding to sea it is customary to place three tarpaulins over the hatch covers, thereby ensuring watertightness. The tweendeck hatches may also be covered by a tarpaulin.

Unless sooner commenced. Laytime usually begins as specified in the voyage charterparty, either immediately Notice of Readiness is properly and correctly tendered and accepted or after an express period following the tendering and acceptance of the Notice of Readiness.