[meaning]

Towing and Anchor Handling Purposes.

Towing and Salvage Purposes.

Auxiliary Crane Ship

A radiosonde equipped to measure temperature only.

Abbreviation for "Transportation and Exportation." Customs form used to control cargo movement from port of entry to port of exit, meaning that the cargo is moving from one country, through the United States, to another country.

Twenty Foot Equivalent Unit (containers): A measurement of cargo-carrying capacity on a containership, referring to a common container size of 20 ft in length.

Integrated Tug/Barge

Time charter

Revenue per day

Time Charter

Tug/Maintenance Boat.

Tug/Oil Skimmer

Tug/Salvage.

Tanker Vessel

Measuring point for compressor acceptance test. Temperature at the compressor inlet flange.

Measuring point for compressor acceptance test. Temperature before an orifice or nozzle, downstream of compressor discharge.

Therefore

A hinged mast step located on deck. Since it is hinged, the mast may be raised and lowered easily.

A gauge that measures engine revolutions per minute.