What is stray current corrosion, and how can it differ from ordinary galvanic corrosion?

A. Stray current corrosion is identical to galvanic corrosion in every respect

B. Stray current corrosion is driven by an external electrical fault (often shore power wiring, a faulty appliance, or a marina's own wiring) rather than the boat's own dissimilar metals — it can be far more aggressive and rapid than natural galvanic corrosion, and can affect a well-bonded, well-anoded boat that would otherwise be protected

C. Stray current corrosion only occurs on boats that have never been connected to shore power

D. Stray current corrosion is a myth with no real electrochemical basis

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