Under the Rules, vessels may depart from the requirements when?

• A. To gain speed
• B. To comply with traffic separation scheme
• C. To avoid immediate danger
• D. To pass a slower vessel

Answer: (C)

The main idea is that safety overrides the Rules in an emergency. When there is imminent danger of collision, a vessel may take whatever action is necessary and reasonable to avoid it, even if that means temporarily departing from a rule. Once the danger is past, normal compliance should resume. This explains why avoiding immediate danger is the best answer: it reflects the emergency exception that allows decisive action to prevent harm.

The other ideas don’t fit because rules like sticking to a traffic separation scheme or pursuing a slower vessel aren’t about emergency avoidance; they’re standard requirements and normal navigational procedures. Gaining speed isn’t a justified emergency action for avoiding danger, and any deviation from mandatory schemes should only occur to prevent an imminent collision and must be executed safely and proportionally.