Artificial objects to supplement natural landmarks indicating safe and unsafe waters.


Related Terms

OPERATING WATER LEVEL

The water level in a boiler drum which is normally maintained above the lowest safe level.

LOW-WATER FUEL CUTOFF

A float device which shuts off fuel supply and burner when boiler water level drops below the lowest safe waterline.

HORIZONTAL DANGER ANGLE

The maximum or minimum angle between two points on a chart, as observed from a vessel, indicating the limit of safe approach to an off-lying danger.

POTABLE WATER

Water that is safe to drink.

FAIR WINDS AND FOLLOWING SEAS

A blessing wishing the recipient a safe journey and good fortune.

SEA ROOM

A safe distance from the shore or other hazards.

SP

Safe port

AAOSA

Always afloat or safe aground. The condition for a vessel whilst in port.

SB

Safe berth

ROADSTEAD

A sheltered area outside a harbour where a ship can lie safe at anchor, also known as a roads.

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