Non-SAR operators posting on here and questioning the wisdom of this kind of approach need to remember that it should be a simple procedure for a well trained SAR crew. Imagine for one second that Blacksod was not a refuel point but the position of an injured person. Would there have been a procedure? Of course not, they'd have used the kit on board to ease their way in. As it was, they followed and trusted a procedure that it seems like none of them had flown and in doing so, missed the basics, namely checking what's on the radar.