Range is specified as 200nm, except Stornoway where it is 250nm.
I hope it said more than that. In 1986 the beancounters took that simplistic view when drawing a 200nm ring around every SAR station, demanding closure when overlap occurred. "Time on task" was the cry, completely ignored.
They compounded it by using a BBC weather map, with the Orkneys and Shetlands located in a box off the Northumbrian coast.