BOTH INTERNATIONAL & INLAND A vessel transferring provisions or cargo at sea shall display during the day __________.

Correct Answer: Option B — three black shapes in a vertical line; the highest and lowest shall be balls and the middle one a diamond

Under COLREGS Rule 27(b), a vessel engaged in a towing operation such as transferring provisions or cargo at sea, which severely restricts the vessels, displays three shapes in a vertical line: balls at the top and bottom with a diamond in the middle.