OK hows this for a PMR 446

[Lightspeed]

C'Mon NR you're a military man.

You know that other than through repeaters, including satelite, that what you are looking for is not even possible using military portable gear.

The police and emergency services cannot easily cover that sort of area either.

Teaching you to suck eggs here: This is first base stuff. You need to adapt your plan to acommodate the physical environment and the kit available.

My group is spread over a similar geographic area and just using 1/2 watt and 2w HTs our emergency plan lets us regroup succesfully in a grid down scenario.