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.

See Heave To

A locker big enough to hang clothes.

To go aboard the vessel; to put onboard a vessel.

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.

A floating log

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.

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

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 ...

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

(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.

A line drawn to indicate both the direction and magnitude of a force, such as leeway or a current.

The bearing of an object after magnetic variation has been considered, but without compensation for magnetic deviation.

An absolute temperature scale. (

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