Rules of the Road · Day Shapes — Sail & Power
A vessel proceeding under sail when also being propelled by machinery shall display forward:
- AA black ball
- BA black diamond
- CA black cone, apex upward
- DA black cone, apex downward✓ Correct
Explanation
A sailing vessel also using her engine is, for the Rules, a power-driven vessel and shall exhibit forward, where best seen, a black conical shape with its apex pointing downward.
Authority: COLREGS/Navigation Rules, Rule 25(e)
Practice the full Rules of the Road bank
Free spaced-repetition quizzing across 2190 USCG exam questions — it schedules your reviews so the ones you miss come back until they stick.
Related Rules of the Road questions
- General & Definitions
72 COLREGS apply to vessels upon which waters?
- General & Definitions
Under 72 COLREGS, which statement best describes the word 'vessel'?
- General & Definitions
A vessel is 'underway' as defined by 72 COLREGS when she is:
- General & Definitions
Under 72 COLREGS, a 'power-driven vessel' is defined as:
- General & Definitions
Which vessels are considered 'restricted in their ability to maneuver' under 72 COLREGS Rule 3(g)?
- General & Definitions
Under 72 COLREGS, a vessel 'constrained by her draft' is one that: