Question

BOTH INTERNATIONAL & INLAND By day, you sight a vessel displaying three shapes in a vertical line. The top and bottom shapes are balls, and the middle shape is a diamond. Which vessel are you observing?

A) vessel trolling
B) mineclearing vessel
C) vessel engaged in replenishment at sea
D) trawler

Answer 1

You are observing a vessel engaged in replenishment at sea when you see a vessel by day displaying three shapes in a vertical line with ball, diamond, ball. So, the correct answer is option d.

Step-by-step explanation:

If you sight a vessel by day displaying three shapes in a vertical line with the top and bottom shapes being balls and the middle shape a diamond, you are observing a vessel engaged in replenishment at sea (answer C).

This specific set of shapes is defined by the International Regulations for Preventing Collisions at Sea (COLREGs), which are used both internationally and inland. The shapes indicate that the vessel is restricted in its ability to maneuver due to the operations it is conducting, which requires other vessels to navigate around it with caution.

Vessels engaged in specific operations such as dredging, underwater operations, or mineclearing may display similar signals, but the combination described here is specific to replenishment activities at sea. So, the correct answer is option d.