Tarq57- correct and correct. I think your suggestion is pragmatic. I've trawled documents for guidance and there seems to be very little. There is mention of a helicopter crossing an active runway to be treated as an intermediate departure from that point, but no mention of said helicopter sat in the hover at a holding point whilst myriad or aircraft happily rotate before it. Are helis in the hover less vulnerable? Would you line up the heli straight after the departure, from the intermediate point and therefore into the wake, and have it wait for 3/4 mins for wake? Seems odd. My understanding is clearly off