Which vessel is NOT required to carry an after masthead light?

Which vessel is NOT required to carry an after masthead light?

• A. A vessel under 20 meters
• B. A vessel of 45 meters in length trolling
• C. A vessel over 60 meters
• D. A sailing vessel

Answer: (B)

The main idea is that the after masthead light is required only on power-driven vessels that meet a length threshold. Specifically, two masthead lights (forward and after) are required on power-driven vessels of 50 meters or more in length. Vessels shorter than 50 meters do not have that obligation. So a trolling vessel that is 45 meters long does not need to carry an after masthead light. A vessel over 60 meters would be expected to have both masthead lights, and sailing vessels follow different lighting rules since they aren’t governed by this power-driven two-masthead-light requirement.

The main idea is that the after masthead light is required only on power-driven vessels that meet a length threshold. Specifically, two masthead lights (forward and after) are required on power-driven vessels of 50 meters or more in length. Vessels shorter than 50 meters do not have that obligation. So a trolling vessel that is 45 meters long does not need to carry an after masthead light. A vessel over 60 meters would be expected to have both masthead lights, and sailing vessels follow different lighting rules since they aren’t governed by this power-driven two-masthead-light requirement.