BOTH INTERNATIONAL & INLAND You are on a vessel and see ahead the lights shown in illustration D059RR below. These lights indicate which of the following?

Correct Answer: Option A — vessel crossing from your port

Illustration D059RR shows a masthead light and both sidelights. Seeing both sidelights ahead indicates you are viewing the vessel from nearly dead ahead. If the vessel is crossing, the presence of both sidelights confirms the vessel is crossing from your port side, as you are seeing her port and starboard lights.