Your engine has started overheating. What is one of the most common causes worth checking first, and why?

A. The engine oil colour, since oil colour alone reliably indicates overheating causes

B. The raw water intake and impeller — a blocked intake strainer, an airlock, or a failed/worn impeller all stop or reduce the flow of cooling seawater through the engine, and this is one of the most frequent overheating causes on small-craft diesels

C. The colour of the exhaust smoke, which is unrelated to cooling in any way

D. The battery voltage, since batteries directly control engine temperature

A. Nothing — a test lift can proceed immediately after repairs

B. Testing should wait until cargo operations begin

C. The area within the grab's swing radius should be cleared of personnel before the lift

D. Only the crane operator needs to be aware the lift is happening

A. Who must remain clear of the exclusion zone while the lift takes place

B. The lunch schedule for the deck team

C. Only the weather forecast for the next watch

D. The cargo manifest for the next port