I carry a small folding Gerber, can't remember the model, but its half serrated half smooth blade. Can be had for about ~30$ at any Cabelas/Bass pro/etc.. Perfect fit in the flight suit sleeve pocket, should be plenty of knife for anything you need. While in the jet VT's, one of the senior wing IP's flew with a no shit miniature machete with at least a foot long blade strapped into his vest, I'm guessing for gutting a javelina if he ever punched out over S TX and was in need of a meal for the night.