A term applied to a bracket supporting the after end of the propeller shaft and the propeller.

The rate (in liters or gallons per minute, cubic meters or cubic feet per second, or other quantity per time unit) Air related flows are usually expressed in CFM, SCFM, ACFM, ICFM

A dimensionless flow parameter, ( Jnr/m), in which J is a significant dimension, often a diameter, n is the fluid velocity, r is mass density, and m is dynamic viscosity, all in consistent units.

A single masted cutter built expressly for the prevention of smuggling and the enforcement of customs regulations.

An instrument designed to add lubrication into the compressed air line.

The pressure which overcomes the total resistances in a system. It includes all losses as well as useful work.

Flat bottomed vessel with a shallow draught.

To mark a course on a chart.

A group of whales.

The relative humidity of a gas (or air) vapor mixture is the ratio of the partial pressure of the vapor to the vapor saturation pressure at the dry bulb temperature of the mixture.

Bank that opens a straight or negotiable letter of credit and assumes the obligation to pay the bank or beneficiary if the documents presented are in accordance with the terms of the letter of credit.

Line attached to the bottom of the boom used to flatten the sail by pulling the boom down, and thus tightening the luff of the sail. (2) A line used for hauling down a jib or staysail.

Load/unload control system that tries to maximize compressor efficiency by matching air delivery and air demand. Compressor is operated at full load or idle.

Document listing all personal goods of crew members.

A sea with waves approaching from the stern of the boat; a sea in which the waves are moving in the same direction as the vessel

Cruising in shallow water and spending the nights in coves.

The forwardmost or front part of the vessel. Opposite of Stern

Loss of effective propeller thrust caused by the blades cutting across the column of water sucked along by the propeller instead of working in it. Can also lead to heavy vibration of the vessel.

Storing on land. Many small boats are placed in dry storage over the winter.

all material and energy present in and around an operating system, such as dust, air moisture, chemicals, and thermal energy.