A measurement. Inside diameter.

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A deck with legs that can be jacked up or down. During operations, the legs rest on the sea-bed. When the rig is moved, the legs are retracted, leaving the rig floating. A jackup has normally no propulsion machinery of its own.

That part of yard that lies between the lift and the outboard end of the yard.

Radio Direction and Range

A small freshwater mollusk that was accidentally introduced to North American waters via ballast water from a transoceanic vessel. The zebra mussel has had significant negative economic and ecological effects: It clogs water intake pipes and attaches to a ...

A measure of the capacity of a material to resist heat transfer. The R-Value is the reciprocal of the conductivity of a material (U-Value). The larger the R-Value of a material, the greater its insulating properties.

The floor or bottom surface of the enclosed space under the deck of a boat

A drive arrangement for power transmission to compressors.

The motion of a vessel when she goes off from her course.

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Fit and beautiful (describing a boat)

A large piece of fabric designed to be hoisted on the spars of a sailboat in such a manner as to catch the wind and propel the boat.

New Building

A mast that is stepped (placed) on the keel at the bottom of the boat rather than on the deck. Keel stepped masts are considered sturdier than deck stepped masts.

Children's bonus bonds, often nicknamed baby bonds, are friendly society policies allowing tax-free.

A small flag placed at the mast head to show wind direction.

For company pension schemes, an employee may retire at an early age provided it is authorised by the.

Ultra High Frequency. (300-3000 MHz) The apparatus using these frequencies are the best one for internal communications on steel ships as they are not hampered by steel bulkheads.