Web alarm clock for 8:06 p.m.
You are handing over your current post at 8:06 pm before taking your place on the quarterly night patrol. Set the alarm for the moment your relief briefing should end, leaving enough time to check the logbook, radio, torch, and assigned route before 9:00 pm. That keeps the changeover from drifting into the first patrol round.
Your quarterly night patrol may begin in a quiet room where a visual alert is easy to miss, so check whether your phone is on silent mode and choose an audible alarm setting if sound is needed. Keep this page active and the phone awake: if either is shut down, the patrol alarm may not sound, leaving you without the planned cue to move from handover to duty.
As the outgoing watch shares the last updates, notice which sounds still compete with the alarm: passing jeepneys, tricycles, conversations near the gate, or a radio at the desk. The area may grow quieter toward 9:00 pm, but do not assume every patrol point will be calm. Place the phone close enough to hear without burying it under papers, and choose a clear tone that stands apart from the remaining evening noise.