See Heave To

The part of the rotating element of a dynamic compressor that imparts energy to the flowing medium by means of centrifugal force. It consists of a number of blades mounted so as to rotate with the shaft.

Ribbon, yarn, or other lightweight material attached to rigging or sails to indicate wind action or direction. Proper use of the telltales can help sailors improve their sail trim.

A locker big enough to hang clothes.

A wearable device used to keep a person afloat. Also called a life jacket, life preserver, PFD or personal floatation device.

The stay that the jib is hoisted on. Usually the headstay.

A stationary vessel carrying a light used for navigation, serving the same purpose as a lighthouse.

The sudden heave of the ship.

Term applied to the direction of the wind when it is favorable to the course being steered.

An absolute temperature scale. (

Use of individual carrier/rail equipment through a central agency for the benefit of carriers and shippers.

Alternatively letting the sails draw, then spilling wind so as to keep a vessel more or less in one place until space is available, marking time.

The center plank on a wooden deck.

A floating log

(1) The rolled up part of a sail, tied with the reef lines, that is used to reduce sail area for heavy winds; To reduce the sail area. (2) A group of rocks or coral generally at a depth shallow enough to present a hazard to navigation.

Succession of long and unbroken waves that are not due to meteorological conditions in the vicinity. Generally due to wind or storms at a distance from the position.

An order to cease (stop).

A signboard attached to a daybeacon to convey navigational information presenting one of several standard shapes (square, triangle, rectangle) and colors (red, green, orange, yellow, or black). Daymarks usually have reflective material indicating the sha ...

Is the ratio of the polytropic compression energy transferred to the gas to the actual energy transferred to the gas.

Hoisting the ensign at 8 a.m. and down at sunset.