I keep looking at this thread's title feeling something is amiss.
I just realised it is the very concept of 'backup.'
I hear this term in firearms, usually a smaller caliber in a
compact package: What the late Colonel Cooper called " sending a
destroyer to 'back up' a battleship." It seems reasonable that
you should first be reasonably sure you won't lose or destroy
your primary blade. If you can't do that, then buy TWO to lose
or destroy. About the only use I see afield for backup blades
are the packers of tactical swords. You know; spreading peanut
butter, cutting paracord, making fuz sticks, striking firesteels.
Kris - something lost in translation maybe? I tend to carry (when canoeing) a bushcraft scandi grind blade in my dry bag (principle knife) and I was considering whether to replace that with a thicker more "survival" style blade. I also want a "back-up" blade that i can easily carry on my body in case of total gear loss in a capsize (a small chance I know - but thats half the fun of acquiring kit....). I have settled on a RAT Izula which turns up thursday (looking forwards to puttting a paracord wrap on it).
Incidently when I'm not in a canoe I don't tend to carry anything more than my bushcraft blade ( a Ben Orford custom Woodlander)on my belt and a small spyderco in my pocket.
Thanks for all your posts and I'm looking forwards to my trip down the Green River this Autumn (sorry "fall")
Moab