I dont know about that Furious, I've done quite a few NOE against fields approaching from the oceans/sea/bay....and very sucessfully, of course not in a group any larger than five. But we fly low, like 25ft off the wave tops and spread out to like 2.0. Hills are better, even better is when the field is on a mesa or plattue (sp?) We have come up on fields were several planes were taking off and not spotted until we hit the field and the ack starts to fly. Of course we have also been routed and stopped before we got there, but usually because someone pulled up to soon and gave away the position. There's a gamble with crossing the open water low like that, will they see or will they pass, makes it fun, and alot miss us and just fly right on by.
AirScrew