You are approaching another vessel and see that she has the signal flag "W" hoisted. What should you do?

Correct Answer: Option A — Attempt to call the vessel on VHF radiotelephone because someone on board requires medical assistance.

International Code Flag "W" translates to "I require medical assistance." Observing this flag requires contacting the vessel via VHF radiotelephone to determine the nature of the medical emergency and render aid.