The maximum rate at which an engine can do work as measured by the resistance of an applied brake. Expressed in horsepower.

An additional extra tax.

Said of a distant ship when her hull is below horizon and her masts and upper works are visible.

Break; e.g., the line parted under strain

Running a compressed air system at a higher than needed pressure.

Covered tunnels within a ship through which the tail shafts pass.

The frame of a container constructed to hold one or more thermally insulated tanks for liquids.

A device invented by Captain Jacques Cousteau in 1943 to enable a diver to operate underwater independent from an air supply from the surface.

The way a boats spars and sails are arranged. To rig a vessel is to fit her with masts, spars, sails and running and standing rigging; term is also used to mean the setting up a device, e.g., to rig a lifeline, a tackle, etc

A course steered by the compass that has been corrected for variation and deviation

A brace, usually triangular, for reinforcing a corner or angle in the framework of a structure.

A stated amount over a fixed rate to one point to make a rate to another point.

A method of moving a boat with oars. The person rowing the boat faces backwards, bringing the blade of the oars out of the water and toward the bow of the boat. They then pull the oars through the water toward the stern of the boat, moving the boat forwar ...

In wooden ship construction, these were cylindrical pins of oak which were used to secure the planks to her timbers. Pronounced "trennels".

The horsepower required to compress adiabatically the air or gas delivered by the compressor through the specified range of pressures.

Electro-mechanical steering device; an instrument designed to control automatically a vessel's steering gear so that she follows a pre-determined track through the water.

An attachment point for another object.

Any point of sail with the wind coming from the side of the boat. If the wind is coming from directly over the side, it is a beam reach. If the wind is coming from forward of abeam it is a close reach. If the wind is coming from over the quarter, it is ca ...

A person or firm who transacts all business in a port on behalf of shipowners or charterers. Also called shipping agent; agent.

Anchor is off the sea bottom when being heaved in .