is the ratio of the actual velocity at a given point to the velocity of sound in the same gas at the conditions existing at this point. These are known as local conditions.

A term for what frequently happened to Nantucket whalers when they left the whaling ship in a small boat to go after a whale. If they harpooned the whale without mortally wounding it, the animal took off with the whaleboat in tow.

Is a single shaft, positive displacement rotary compressor.

Usually the forward berth of the boat, located in the bow

see Monkey Jacket.

A wood or fiber cover placed around such containers as cans and bottles.

[meaning]

A control line, usually a multi-purchase tackle, secured to the boom to prevent it from lifting. Can also apply to other spars, such as gaffs.

Officer's recreation area.

Measuring point for compressor acceptance test. Pressure at the compressor outlet flange.

[meaning]

A device attached to a safety or safety relief valve that prevents it from opening at the set pressure.

[meaning]

A multilateral maritime treaty adopted in 1921 (at The Hague, Netherlands). Standardizes liability of an international carrier under the Ocean B/L. Establishes a legal "floor" for B/L. See COGSA

Compressors that operate with an intake pressure below atmospheric and discharge pressure usually atmospheric or slightly higher.

The shape of a sail, with regard to its efficiency. Controls such as the cunningham, boom vang, outhaul, traveler, halyards, leech line, sheets, and the bend of the mainmast all can affect sail shape. Also sail trim.

To veer or haul on a rope, slightly, so that a part subject to nip or chafe is moved away and a fresh part takes its place.

The situation of two vessels, lying alongside one another, so near that their yard-arms cross or touch.

A two masted sailboat with the shorter mizzen mast placed aft of the rudder post. A ketch is similar, but the mizzen mast is forward of the rudder post.

Pay day