Page 133 - Collision Avoidance Rules Guide

of her obligation to keep out of the way and to achieve a safe pass-
ing distance.

The four stages in a collision situation

When two vessels in sight of each other are approaching with no
change of compass bearing, so that when there is risk of collision one
of them is required to keep out of the way by a Rule from Section 11,
there may be four stages relating to the permitted or required action
for each vessel:
1. At long range, before risk of collision exists, both vessels are
free to take any action.
2. When risk of collision first begins to apply the give-way ves-
sel is required to take early and substantial action to achieve a safe
passing distance and the other vessel must keep her course and
speed.
3. When it becomes apparent that the give-way vessel is not taking
appropriate action in compliance with the Rules the stand-on vessel is

Action required

Action permitted
Signal required

Keep course
and speed

Action permitted

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