Towing & Ship-Assist · Towing Lights
By day, when the length of a tow exceeds 200 meters, the towing vessel and the vessel being towed must each exhibit:
- AA black ball
- BTwo cones apex together
- CA cylinder
- DA diamond shape where it can best be seen✓ Correct
Explanation
When the tow exceeds 200 meters, both the towing vessel and the towed vessel display a diamond shape by day where it can best be seen, the daytime equivalent of the extra masthead light.
Authority: Navigation Rules, Rule 24(a)(v) & 24(e)(ii)
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