A certificate which gives details of a ship's freeboard and states that the ship has been surveyed and the appropriate load lines marked on her sides. The certificate is issued by a classification society or coastal authority such as a coast guard.

Related Terms

BUMPKIN

The spar projecting from stern of ship

TRAMP FREIGHTER

A cargo ship engaged in the tramp trade.

CORDAGE

Ropes in the rigging of a ship

WEATHER SIDE

The side of a ship exposed to the wind.

False brinelling

False brinelling of needle roller bearings is actually a fretting corrosion of the surface since the rollers are the I.D. of the bearing. Although its appearance is similar to that of brinelling, false brinelling is characterized by attrition of the steel, and the load on the bearing is less than that required to produce the resulting impression. It is the result of a combination of mechanical and chemical action that is not completely understood, and occurs when a small relative motion or vibration is accompanied by some loading, in the presence of oxygen.

AXIAL-LOAD BEARING

A bearing in which the load acts in the direction of the axis of rotation.

DOGWATCH

A short, evening period of watch duty on a ship

EP (EXTREME PRESSURE) LUBRICANTS

Lubricants that impart to rubbing surfaces the ability to carry appreciably greater loads than would be possible with ordinary lubricants without excessive wear or damage.

BRINELLING

Permanent deformation of the bearing surfaces where the rollers (or balls) contact the races. Brinelling results from excessive load or impact on stationary bearings. It is a form of mechanical damage in which metal is displaced or upset without attrition.

FARDAGE

A wood placed in bottom of ship to keep cargo dry

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