Sailor's name for a block of sandstone used for scrubbing the wooden decks of a ship; seamen had to get down on their knees to use them. Large holystones were known as "Bibles", while smaller blocks to reach awkward places were known as "Prayer Books" ...

The bow and forward part of the vessel above the waterline.

Maritime area usually specified by range of ports in which a vessel may operate

Chest, or compartment, in which is stowed clothing for issue to crew.

In the direction the wind is blowing. A boat sailing downwind, away from the wind source with the sails let out all the way, is running with the wind.

When a ship's head or stern pitches suddenly and violently into the trough of the sea.

Transverse or longitudinal partitions separating portions of the ship ("walls" in a ship).

In a dynamic compressor, surge limit is the capacity below which the compressor operation becomes unstable.

(1) The action of a line as it passes over the sheave of a block. (2) The act of easing away gently.

A region near the earth in which the relative velocity increases from zero with elevation, due to the motion of the atmosphere relative to the earth's surface.

The area of calm which lies inside the trade winds near the equator.

Notations made when the cargo is received at the carrier's terminal or loaded aboard a vessel. They show any irregularities in packaging or actual or suspected damage to the cargo. Exceptions are then noted on the bill of lading.

(1) A ruffle on the water indicating a breath of wind during a calm (2) A twisting hitch made in the bight of a rope to form two eyes, through which the hook of a tackle is passed for hoisting purposes.

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

This is the pressure found on the suction side of a refrigeration system.

To change the course of a sailing vessel.

ACRONYM - Approach temperature. Usually the difference between cooling water temperature in to compressed air temperature out of an inter-cooler or after-cooler. Sometimes used to define oil cooler efficiency (cooling water temperature in to oil temperatu ...

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 valve that controls the flow of air that passes through the valve. Used often for retardation or timing circuits, but especially for regulating the piston speed in cylinders.

To put in place of another; i.e., when an insurance company pays a claim it is placed in the same position as the payee with regard to any rights against others.