Why does antifouling paint need reapplying periodically, and what determines roughly how often?

A. Antifouling is a one-time application that lasts the lifetime of the hull

B. Antifouling works by slowly releasing biocides (or, for some types, gradually eroding) to deter marine growth — its effectiveness diminishes over a season or more as the active ingredient depletes, so it needs reapplying periodically, with the exact interval depending on the paint type, local water conditions, and how much the boat is used versus left static

C. Antifouling only needs reapplying if the hull colour visibly changes

D. Modern antifouling never needs reapplication once cured

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