The shaft speed specified for the ship's acceptance on initial delivery, or after being modified, as applicable

An aqueous solution containing one gram equivalent of the active reagent in 1L of the solution.

The stress component perpendicular to a plane on which forces act. Normal stress may be either tensile or compresssive.

A type of pressure-plate anemometer in which the plate, restrained by a stiff spring, is held perpendicular to the wind. The wind-activated motion of the plate is measured electrically. The natural frequency of this system can be made high enough so that ...

Heating a ferrous alloy to a suitable temperature above the transformation range and then cooling in air to a temperature substantially below the transformation range.

A pin placed through the head of a rudder to prevent it from being lost.

Norwegian classification society.

One of the 4 cardinal compass points. North is the direction toward the North Pole and is at 0

The top point of the line about which the earth rotates.

Polaris, the North Star, is visible in the northern hemisphere and indicates the direction of north. In the southern hemisphere the Southern Cross is used to find the direction of south.

Wind coming from the north.

National Ocean Service (Part of NOAA)

Front of a container or trailer - opposite the tail.

Said of a vessel when unable to maneuver.

Same as not under command.

Periodic publications containing details of any alterations to charts, to keep them up to date.

Noting is a preliminary form of protesting a Bill of Exchange - that is - an initial official statement that the bill of exchange or promissory note has not been paid.

Notice To Mariners

(Adverb) Today - In our days. I.e Nowadays most ships produce their own fresh water in an evaporator fed with sea water and using the heat of the engine.

A projecting aperture at the end of a tube, pipe etc. serving as an outlet for compressed air. Reduces the demand on the compressor by generating the highest thrust and volume for the lowest possible air consumption.