I have been known to take a tin whistle or a piccolo out with me into the woods, and a small e flat piccolo is extremely shrill in the high notes, I don't doubt that it carries. Never mind standard emergency signals is there a tune one can play when one is in danger - nearer my god to thee, when sinking in quicksand perhaps
I do have a whistle/compass and torch thingy that came with a pair of Karrimor KSB's that I have put with my FAK. I've got one or two other small whistles lying around, some I consider a bit dubious. I used to have one of the dubious whistles, on sale from the likes of Millets and Go Outdoors on my keyring till the fipple came out. I was not impressed. As for the plastic ones, they all seem a bit fragile to me, If I could find something that would not split or collapse if you drove a car over it, I might consider it a good buy. My 'tin' whistle would survive that test, it is very solid brass, something of equivalent quality would be quite a find
I do have a whistle/compass and torch thingy that came with a pair of Karrimor KSB's that I have put with my FAK. I've got one or two other small whistles lying around, some I consider a bit dubious. I used to have one of the dubious whistles, on sale from the likes of Millets and Go Outdoors on my keyring till the fipple came out. I was not impressed. As for the plastic ones, they all seem a bit fragile to me, If I could find something that would not split or collapse if you drove a car over it, I might consider it a good buy. My 'tin' whistle would survive that test, it is very solid brass, something of equivalent quality would be quite a find