USCG Exam PracticeRule 17 — Action by Stand-on Vessel
Vessel A is the stand-on vessel in a crossing situation with Vessel B. Vessel B has failed to give way. Vessel A is now so close to Vessel B that collision cannot be avoided by Vessel B's action alone. At this point, which combination of rules governs Vessel A's mandatory obligation, and what action does Vessel A take?
- A. Rule 16 governs; Vessel A shall take early and substantial action to keep well clear
- ✓ Rule 17(b) governs; Vessel A shall take such action as will best aid to avoid collisionCorrect
- C. Rule 19 governs; Vessel A shall reduce to minimum steerage speed and navigate with extreme caution
- D. Rule 17(a)(i) governs; Vessel A shall continue to keep her course and speed until contact
Why B is correct
33 CFR §83.17(b) is the controlling provision once the stand-on vessel is so close that collision cannot be avoided by the give-way vessel alone; at that point the stand-on vessel 'shall take such action as will best aid to avoid collision.' Rule 16 governs the give-way vessel, Rule 19 applies in restricted visibility to vessels not in sight, and §83.17(a)(i) describes the earlier, pre-emergency duty.
Cited:33 CFR §83.17