Question 1

You felt reasonably alert during the middle of the day. Does that mean you're safe to take an unrested night watch later on?

Accepted Answer

No — the circadian alertness cycle has natural troughs later in the day; a peak earlier does not carry forward, and sleep debt re-emerges at the next low point The Sustain skipper felt relatively alert at midday and used that window to rest, but the rest taken was insufficient, and by evening the circadian cycle had moved into a lower-alertness phase working against him. Feeling alert earlier in the day is not evidence of safety for a later watch.

Question 2

You're asked to test a deck crane grab after electrical repairs nearby. As the grab is hoisted, what should have happened first?

Accepted Answer

The area within the grab's swing radius should be cleared of personnel before the lift On the bulk carrier Fairfield Eagle, a crew member working nearby was struck and fatally injured when a grab being test-lifted after repairs swung unexpectedly. The investigation found the area should have been cleared and barriered before the test lift began.

Question 3

A toolbox talk held before a lifting operation should explicitly cover which of the following?

Accepted Answer

Who must remain clear of the exclusion zone while the lift takes place A toolbox talk exists to make sure everyone present understands the danger zones, the abort signal, and — critically — who must not be in the area while the lift happens. The RMIMA investigation into the Fairfield Eagle fatality found the toolbox talk had not made this clear.