The next quarterly test of the all-Island public warning siren system takes place at 11am on Easter Saturday, 3rd April.
Sirens at 31 sites around the Isle of Man will sound a steady note for 30 seconds, signifying all clear.
In a real emergency, the sirens will sound a rising and falling note for three minutes in which case the public are instructed to 'Go In, Stay In and Tune In' to local radio stations to await instructions specific to the emergency.
There is no need to take any action during the routine quarterly test of the sirens on Saturday.
Emergency Planning Officer Martin Blackburn said, "The hazards facing modern society are varied and changing but the tried and tested methods of getting warning messages to the public are just as effective today as they were 50 years ago.
"Not many people can ignore a three minute warning siren without trying to find out what’s going on, hence the message 'Go In, Stay In and Tune In'.