Convention on the International Regulations for Preventing Collisions at Sea


Related Terms

PLASTIC COLLISION

A collision in which one or both of the colliding bodies suffers plastic deformation and mechanical energy is dissipated.

INELASTIC COLLISION

A collision in which the total kinetic energy of the colliding particles is not the same after the collision as before it.

IN EXTREMIS

Condition in which either course or speed changes or both are required on the part of both ships if the ships are to avoid collision

DECREASING RANGE

When two boats are approaching each other from any angle and this angle remains the same over time (constant bearing) they are on a collision course. Because of the implication of disaster (ships might collide) it has come to mean a problem or an obstacle which is heading your way. Often used in the sense of a warning, as in 'watch out for this problem you might not see coming.

NAVIGATION RULES

Rules of the road that provide guidance on how to avoid collision and also used to assign blame when a collision does occur.

COLLISION AVOIDANCE SYSTEM

An electronic system commonly used to prevent collisions in inland navigable waterways.

COLLISION BEARING

A constant bearing maintained while the distance between two craft is decreasing. collision cour

COLLISION BULKHEAD

The foremost main transverse watertight bulkhead designed to keep water out of the forward hold in case of bow collision damage.

FOREPEAK BULKHEAD

The foremost main transverse watertight bulkhead designed to keep water out of the forward hold in case of bow collision damage.

SAFE SPEED

That speed of a vessel allowing the maximum possible time for effective action to be taken to avoid a collision and to be stopped within an appropriate distance

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