Information in functional use differences for single bevel vs double bevel fixed blad

[dfsutton]

In relation to a large, fixed blade tactical/survival knife, what is the difference in functional use between a single bevel and double bevel knife? What you recommend for survival/defense use?

 

[HwangJino]

Double bevel.

I use a single bevel blade, but ONLY to cut delicate pieces of fish. Single bevels are very sharp. I'd imagine it being too fragile for outdoor use.