Rules of the Road · Steering & Sailing Rules
Under Rule 17(a), the stand-on vessel in a crossing situation shall:
- AImmediately alter course to port to open the CPA
- BImmediately reduce speed to allow the give-way vessel more time
- CMaintain her course and speed✓ Correct
- DSound five short blasts and then take independent action
Explanation
Rule 17(a)(i) obliges the stand-on vessel to maintain course and speed. This predictability is essential — the give-way vessel plans its maneuver based on the stand-on vessel continuing unchanged. Unpredictable early action by the stand-on vessel can negate the give-way vessel's avoidance.
Authority: 72 COLREGS Rule 17(a)(i)
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