Lesson 3: Action to Avoid Collision
Lesson 3: Action to Avoid Collision
Rule 8
Turn a correct assessment into early, substantial and verifiable action.
What good action looks like
- Positive and made in ample time.
- Large enough to be readily apparent visually or by radar.
- Consistent with good seamanship.
- Designed to produce a safe passing distance.
- Checked until the vessels are finally past and clear.
A succession of small alterations is hard for another vessel to interpret. When there is enough sea room, a substantial alteration of course alone may be most effective.
Speed is also a control
If more time is needed, reduce speed, take all way off, or reverse propulsion as appropriate. Never assume that one alteration has solved the problem: observe the result.
Scenario check
Scenario: You alter five degrees and the bearing remains steady. Is the action complete?
Show the recommended decision
No. The alteration may be too small and has not produced a safe result. Take further effective action and keep monitoring.
Rule link: Rule 8.
Source: USCG Navigation Rules.
Educational material only. It does not replace the current official rules, notices, local regulations, proper training or prudent seamanship.