Guys,
As Agaricus has previously said, I don't think that it's likely to happen. Certainly not in an organised fashion.
If the sh*t hits the fan and there is some major catastrophic incident which requires the transportation of equipment and personell then it's possible that all hands will be on deck and every available resource might be employed to do whatever it takes to provide assistance.
What that incident might be, well , who knows? But I think if it were to happen, then it would become reasonably apparent, and the rule book would be going out the window.
On a separate, but similiar note, how would everyone have felt if Mr Paxton had offered (indeed he may have done) to assist in the search for April Jones (the missing girl in Wales). Assuming he conducted his search in VFR conditions and with a 'navigator' on board, would that have been acceptable ?
Joel