Hinged extension of the tiller which allows the skipper to control the tiller while hiking or sitting forward.

The left side of the ship.

To trim the sheets in.

A fix taken by taking bearings of a single object over a period of time. By using the vessel's known course and speed, the location of the vessel can be found.

Cycles per minute - a unit of measure of the frequency of any vibration.

A draft that matures on a fixed date, regardless of the time of acceptance.

To change a boat's direction, bringing the bow through the eye of the wind.

Maximum pressure a vessel, or air filter housing will withstand without bursting.

Sailor's term for being about to get married, a splice being used to join two ropes together.

Voyage made in varying directions. To sail in various directions for pleasure, in search, or for exercise.

A seaman's personal "painter" is his lifeline, and if it is severed, he dies.

A bridge that can be raised vertically to allow boats to pass underneath.

Ice in an area containing several small pieces of floating ice, but with total water area exceeding total area of ice.

To subject petroleum oil to heat for breaking down into lighter products.

An indication on a draft that the documents attached are to be released to the drawee only on payment.

Accumulation of foreign matter, such as mud or debris, in a cooler, pipe, or valve. In a cooler, H 2 O D P and D T will be seen to increase, as well as CTD.

The horsepower input to the compressor shaft, or more generally to any driven machine shaft.

A propeller at the lower sea-covered part of the bow of the ship which turns at right angles to the fore-and-aft line and thus provides transverse thrust as a maneuvering aid. A propulsor installed near the bow to provide a transverse thrust component en ...

Long-range navigation system that uses radio signals transmitted at specific times. An onboard receiver computes position by measuring the difference in time of signal reception. This system is being phased out in favor of GPS.