Web alarm clock for 3:54 a.m.
As you hand the wharf gate duty to the next worker, set the alarm for 3:54 am so the wholesale fish landing can open without a rushed changeover. That leaves a short handover before 4:00 am, enough to pass on the key, confirm which boats are expected, and point out any vehicle waiting outside.
The sound should fit both the sleeping surroundings and the need to act promptly. A gentle tone may suit you if the phone is close and others are resting nearby; a more persistent one makes sense if diesel engines, ice boxes, or early market traffic could mask the first notes. Keep the volume clearly audible during the handover. Because a browser alarm cannot sound after its page is closed or the phone goes to sleep, the wharf gate could remain locked when the incoming worker expects access.
Before leaving the landing in the dark, use the minutes after 3:54 am to protect the next commitment on your same-day schedule. Note who has taken the key and when the gate was opened, then keep a small buffer for travel, washing up, or breakfast rather than filling every minute with another wharf task. Early fish deliveries around Philippine ports can shift quickly, so this margin helps one delayed handover stay separate from whatever you need to do after dawn.