disturbedone - to transmit the details of a flight/nominate SARtime over radio is much more time consuming, than saying "XXX arrived <airport>, cancel sartime"
I usually set alarms 30, 15, 10 and 5 mins off the SARtime. I was caught out once when I got a call just after shutdown - two minutes after my nominated SARtime. - admittedly my bad planning, however I did try and cancel overhead the aerodrome, to no avail.
Pyro