I was in the AF for 8 yrs (Desert Storm/Shield included) in Survival Equipment. You would be surprised whats really used for survival purposes. The standard was the AF pilots knife. The small cheap three blade colonial stockman (was a three dollar knife!) was the norm for the ba-18 survival chute survival kits. The 4 blade utility knife was the norm for the survival raft kits (not too mention both had a version of the hooked blade knife).
It all comes down to your needs. A sak can make an excellant survival knife. The pilots knife is a good knife, but the knife has always suffered two problems, one the blade tang is thin and is prone to breakage at the point it connects to the handle, through the guard. The second is the tip. Its still a good knife, but the saw, which many do not know, is intended to cut through sheet metal, not wood (for anyone who's tried it, the saw cuts wood very poorly, wasnt inteded for this purpose).
When I was in the AF I used a sak, and a issue ontario f/u better known as a kabar (used generically of course for any knife, camillus, ontario, pal, utica, ect patterned after the original kabar produced f/u). Ive also used a western w49. It all depends on the room you have, and the weight your willing to carry. There are knives that are very durable, also very expensive, the thing to remember is that any decent knife can be used as a survival knife. No matter what you choose consider teaming it with a sak (like a camper model with saw!), you cant go wrong that way. also remeber many forget this, but include a compact sharpener, such as a lansky, dog bone hone.
A kitchen knife could be a survival knife, the key is to pick according to what you think you might need, want to carry, room available, ect.
The classic "rambo" knife is not really needed.
hope this helps some!
