I personally stick the coastline on the wingtip: The higher you go the further offshore you are, but always high enough to reach land if the donk stops.
Tried a 'practice pan at 2000 feet just off coast at Harwich the other day: Took D & D an uncomfortably long time to find me: in fact I was in the process of cancelling the practice pan when they finally got me.
Dont know where nearest receiving station is to E Anglia but they were struggling.
Safe flying
Cusco