Read the book that includes this incident Emergency: Crisis on the Flight Deck. Pilot's have 4 or 5 point harnesses, but don't wear outside of takeoff and landi

Read the book that includes this incident Emergency: Crisis on the Flight Deck. Pilot's have 4 or 5 point harnesses, but don't wear outside of takeoff and landing. In level, uneventful flight, it's just the lap belt. Further, if you're walking around, say to the bathroom, you might not yet be belted in.