Four chain links drop in one at a time and lock together in a row: Pilot, Operator, Aircraft and Job. The chain is then pulled taut. When every link is clear, a job pack record appears with a green 'Documented' tag. Toggle buttons let the learner mark any link as unclear: that link is drawn open with a question mark, the chain parts there when pulled, and the tag reads 'Pause, escalate'. Back and Next buttons step through the links.
