Something I don’t remember seeing mentioned here other than mirrors is signalling devices.
I was just repacking a small shoulder bag 8″h X 6 1/2″w X 3″d that’s the main compartment with 2 smaller pockets, it’s designed to go in my BOB but I take it whenever I go sailing, offroading or hiking or whatever. One of the things in there is a rescue marker 1metre by 1metre dayglo orange cross I cut out of a piece of spinnaker cloth, orange is the international distress colour and obviously stand out well against most backdrops.
Mirrors are okay but you have to be awake and alert to use one as with flares which are also not too easy to carry anywhere. I also have a large bright orange plastic survival bag which most of us always carried in the army. One of the things that kills the majority of hikers and climbers in the UK is a combination of Hypothermia and not being found in time, a big orange marker makes you much more visible particularly for aerial searchers but quite often for ground searchers too if it is positioned well.
I have used one of the orange body bags in Denmark in November with only combats and an NBC suit over the top ( I got lost in heavy freezing fog) and it kept me warm enough in a tactical situation on an excercise where I couldn’t light up a hexy stove for hot drinks or warmth and if I had stayed lost would have helped searchers to find me.
A metre square piece of kite material will do the job and folds into nothing and a few ally nails to peg it down.
Does anyone else carry this kind of thing?