At sea, you are approaching a small vessel and see that it has the signal flag "P" hoisted. What should you do?

Correct Answer: Option A — Approach with caution because the vessel is a fishing vessel and its nets are fouled on an obstruction.

International Code Flag "P" (Blue Peter) when displayed at sea by a fishing vessel indicates that its nets have fouled on an obstruction, requiring approaching vessels to exercise extreme caution.