A type of valve in which the closing element (the gate) is a disc that moves across the stream in a groove or slot for support against pressure. A gate valve has relatively large full ports and a straight line flow pattern. Very little pressure drop howev ...

Break loose.

Unit of speed in navigation which is the rate of nautical mile (6,080 feet or 1,852 meters) per hour.

Securing to a dock or to a buoy, or anchoring with two anchors.

The rope used to spread the clew of head sails and to control the boom of boom sails.

The casing of a block within which the sheave revolves.

A marine term referring to loading freight into ships' holds.

Reversing.

Technical BulletinsCalculators listed here is dedicated to a specific task.

Technical BulletinsCalculators listed here is dedicated to a specific task.

Military B/L: B/L issued by the U.S. military; also known as GBL, or Form DD1252.

Straight (Consignment) B/L: Indicates the shipper will deliver the goods to the consignee. It does not convey title (non-negotiable). Most often used when the goods have been pre-paid.

The raised platform extending athwartships, the part of the ship from which the ship is steered and navigated.

Overboard (over the side).

A cluster of piles for mooring.

An opening in a ship's deck for passageway or for handling cargo or stores.

The latitudes on the outer margins of the trades where the prevailing winds are light and variable.

A permit by the port doctor for an incoming vessel, being clear of contagious disease, to have the liberty of the port.

The part of the bow above the water.

Battens, or a series of parallel runners, fitted beneath boxes or packages to raise them clear of the floor to permit easy access of forklift blades or other handling equipment.