Scafool posed the question not me - "if searchers are out", how best to signal them. If searchers are looking for me it doesn't really matter how remote I am, I could have a broken back and be 1 km from the trail head, I am not walking out, I am not in contact with others, I won't be heard by searchers with most whistles or by shouting. And I left my bugle and bongos at home. Activate my PLB and SAR hones in on the signal, reducing the search time and hopefully ensuring the safety of searchers. I vote for the PLB to help connect searchers with the injured and lost.