More of a GA issue when flying IFR.
If a clearance cannot be obtained on the ground in places where ATC can't be reached on the ground, won't it involve having to stay under 1500ft until a clearance can be obtained? Depending on radio traffic and ATC load, this can take some time. So on an IFR flight plan, possibly with low cloud, can't ensure terrain clearance by planning a departure within the splay set out in ersa, or reverse approach etc. If cloud is a factor, i think it would mean having to maneuver clear of cloud within the circling area which is not really idea. Or is there another approach?