When two power-driven vessels are crossing, the vessel with the other to starboard must keep out of the way under what condition?

• A. When there is glare
• B. The weather is poor
• C. If the situation involves risk of collision
• D. Only at night

Answer: (C)

In crossing situations, the vessel that has the other vessel on its starboard side must keep out of the way whenever there is a risk of collision. This means the give-way action is triggered as soon as continuing on the current courses and speeds could lead to a collision, and the vessel must take early and substantial action to avoid it. The stand-on vessel should maintain its course and speed unless the risk of collision persists or the other vessel fails to take appropriate action.

Glare, poor weather, or night do not by themselves create the obligation; they may affect visibility and caution, but the trigger for giving way is the presence of a risk of collision.