How to use the online alarm clock
Getting ready at 4:13 pm gives you space to check the ropes, key and lock instructions before taking the boat through the lock ahead of closing. Setting the alarm now keeps that preparation tied to a clear moment rather than a hurried glance at the clock. With 5:00 pm approaching, the alert can mark the point when checking ends and departure needs to begin.
For this boat trip, the alarm needs to be audible above conversation, engines and activity beside the water. Check the sound level and make sure silent mode will not suppress the alert; a quick test beforehand can confirm what you will actually hear. If the browser stops running or the phone goes to sleep, the alarm cannot sound, which could leave the boat waiting beyond the planned departure point. Keep the page active and the equipment powered while you prepare.
Once the boat is through, the remaining afternoon may still contain travel, mooring or another commitment. Allowing a separate buffer before that next job means a slow lock passage does not immediately disrupt the rest of the day. At 4:13 pm, daylight and local closing arrangements can shape the schedule, so the useful margin is the one left after securing the boat, not merely after clearing the gates.
Common questions
Will it still be right when the clocks change?
Yes. It reads your device's local clock, so the move between GMT and BST at the end of March and October is picked up automatically, as long as the computer's date, time and time zone are set correctly.
Can I use this on a phone?
It works in a mobile browser, but phones lock the screen and suspend background tabs far more readily than a laptop does, which can stop the alarm sounding. For anything important, a desktop or a plugged-in laptop is the steadier option.
Does the alarm still work if I close the tab?
No. Everything runs inside this page, so closing the tab — or quitting the browser altogether — ends the countdown there and then. Leaving it open in the background is all it asks, and switching to another tab makes no difference.
What happens if my laptop goes to sleep before 4:13 pm?
The tab sleeps along with it and the alarm will not sound on time, if at all. If you are relying on it, change the power settings so the machine stays awake, or keep a phone alarm running as well.
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