Lesson 6: Give-way and Stand-on Vessels

Rules 16–17

Understand both sides of the relationship and the escalation when the plan is failing.

Give-way duty

The give-way vessel must, so far as possible, take early and substantial action to keep well clear. Predictability matters: an obvious alteration astern is normally easier to understand than a marginal pass ahead.

Stand-on duty

The stand-on vessel initially keeps course and speed. It may act as soon as it becomes apparent that the give-way vessel is not taking appropriate action. It must act when collision cannot be avoided by the give-way vessel alone. In a crossing situation, a power-driven stand-on vessel acting under Rule 17(a)(ii) should, if circumstances admit, avoid altering to port for a vessel on her own port side.

Scenario check

Scenario: You are stand-on, but it is now clear the give-way vessel’s action alone cannot prevent collision. Must you continue holding course?

Show the recommended decision

No. You must take the action that will best aid avoidance.

Rule link: Rule 17(b).

Source: USCG Navigation Rules.

Educational material only. It does not replace the current official rules, notices, local regulations, proper training or prudent seamanship.