Catching Circadian Drift Before the Next Bridge Watch
A Second Mate on a Singapore-to-Long Beach transpacific hands over at 03:50 on voyage day eight, already two heading excursions into his watch. The drift started three days earlier, hidden in the 4-on-8-off pattern that nobody was reading as telemetry. This post shows what the pre-watch signal looks like and how to read it before the pilot boards.
circadian drift bridge watch, deck officer alertness signs, pre-watch fatigue screening, bridge handover energy check, offshore watchkeeping circadian markers