BOTH INTERNATIONAL & INLAND A 60-meter vessel which is trawling is required to show which of the following?

Correct Answer: Option A — one masthead light at night.

Rule 26(b) dictates that a vessel engaged in trawling must exhibit a green light over a white light. Additionally, if the vessel is 50 meters or more in length, Rule 26(b)(ii) requires it to show one masthead light abaft of and higher than the all-round green light.