A pipe lead-in for anchor chain through ship's bow.

Large strong rope used for towing purposes and for securing or mooring ships. Hawsers are now mostly made of steel.

A rope used for towing or, mooring.

An industry abbreviation for "Hazardous Material."

An object that might not allow safe operation. A group of rocks just under the water or a submerged wreck could be a navigational hazard.

To make life onboard for the crew as uncomfortable as possible, by keeping them at work at all hours, often unnecessarily.

The ship's water closet (toilet or wash-room). The upper edge of a quadrilateral sail.

The energy in foot pounds required to compress adiabatically and to deliver one pound of a given gas from one pressure level to another.

To turn the boat away from the wind. also Fall Off.

The energy in foot pounds required to compress polytropically and to transfer one pound of a given gas from one pressure level to another.

A term used to describe the hot gas pressure on the outlet side of the refrigeration compression.

The height of the decks, below decks.

A sea which is traveling in the opposite direction to that of the boat

Where the boat is pointed directly into the wind, sails luffing

Change direction so as to point closer to where the wind is coming from. The opposite of falling off.

A small wooden, metal or plastic insertion at the head of a mainsail.

When the wind shifts toward the bow. Opposite of lifted.

(1) A wind shift further forward relative to the boats direction or heading. (2) A bar or angle under a deck the same size as deck beams. It is used around stair openings in deck, small hatch openings, or at dead end of longitudinals.

The main distribution pipe.

A grooved metal extrusion fitted on a forestay and used to secure the luff of a sail by holding its bolt rope in place.