Why is it good practice to periodically check that turnbuckles (rigging screws) haven't seized, even if the rig tension itself seems fine?

A. Turnbuckles never seize once correctly installed, regardless of age or environment

B. A seized turnbuckle can't be adjusted when it actually needs to be — for retuning the rig, or in an emergency where quickly slacking or tightening a stay matters — and seizing is a real, common risk from corrosion or lack of use, particularly in a marine environment, which is why working them (or at least checking they still turn) periodically is worthwhile even when no adjustment is currently needed

C. Turnbuckle seizing is purely a cosmetic issue with no functional consequence

D. Only turnbuckles on wooden-hulled boats are prone to seizing

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