What is "diesel bug", and why is it a genuine ongoing risk even in a well-maintained fuel tank?

A. A type of insect that occasionally gets into fuel filler caps

B. A microbial contamination (bacteria and fungi) that grows at the interface between diesel and any water sitting at the bottom of the tank — it thrives especially in tanks that sit mostly full and undisturbed for long periods, and the resulting sludge can clog fuel filters and starve the engine, often at the worst possible moment

C. A manufacturing defect specific to certain diesel engine brands

D. A problem that only affects petrol engines, never diesel

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