A certificate authenticated by a recognized port authority, certifying that a ship comes from a place where there is no contagious disease, and that none of her crew was infected with such a disease.

Electrical power converter; converts square-wave DC current to sine-wave AC current

A device used to keep a line from slipping, such as a jamcleat.

A hand held pneumatic tool. Designed for light demolition work, digging, making holes etc.

Present a rate proposal to a conference meeting for adoption as a conference group rate.

A filter element so full of contaminants that no longer can pass rated flow without excessive pressure differential.

A Latin term meaning "For the sake of form."

A compartment where the crew lives.

The portion of a valve used to guide the disc.

A change in the wind direction.

A strong vertical post used to attach lines for towing or mooring.

A large net with its mouth held open, towed by a trawler along the bottom to catch bottom fish.

A buoy on the race course around which boats must turn.

Port where cargo is discharged from means of transport.

A term used to cover all of the anchor gear.

When reciprocating compressors run, the moving parts such as pistons, rods, crossheads, connecting rods are repeatedly accelerated and retarded. These velocity changes set up pulsating inertia forces. The forces are of the first and second order. The firs ...

Vessel or vessels of practically any size or type.

Leaning out over the side of the boat to to counteract heel and balance it.

A sudden burst of wind stronger than the current wind conditions.

States that the volume of a gas, at constant temperature, varies inversely with the pressure.