Online alarm clock for 1:43 am
You are handing the island reserve trap check to the next person before your shift ends, so set the alarm for 1:43 am while the route and handover notes are still clear. That gives them a firm starting signal before 2:00 am, without relying on someone to keep watching the clock during the changeover.
Because the alarm may sit waiting while the handover continues, check whether the phone or computer is likely to enter sleep mode first. Keep it awake, leave the browser running, and use a power source if the battery is low. If the browser stops running or the phone sleeps, the alarm cannot sound, and the next trap check may be missed. A separate alarm on another device is sensible when the reserve schedule cannot wait.
Anyone heading out at 1:43 am will be working with very little natural light, so prepare illumination before the shift changes hands. Place a charged torch beside the route notes, test its beam, and keep a backup light where it can be found without searching. Dim the screen after setting the alarm so it does not spoil night vision, but leave enough light around the handover point to read labels and collect equipment safely.