Towing & Ship-Assist · Day Shapes
When the length of the tow astern exceeds 200 meters, both the towing vessel and the tow display, by day, a:
- ASingle black ball
- BDiamond shape where it can best be seen✓ Correct
- CCylinder
- DCone, point up
Explanation
For a tow exceeding 200 meters in length, a diamond shape is shown by day on both the towing vessel and the last vessel of the tow, marking the exceptional length just as the third masthead light does at night.
Authority: Navigation Rules, Rule 24(a) and (e)
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