I was Navy and although my preference was fixed blades, my COs / XOs didn't think officers needed to carry knives, so I got into carrying folders so they couldn't see I had knives. I had 4 all SS no-name 3.5 inch frame locks from Target for about $6 each. I carried one in each front pocket (see last paragraph). Lasted me 20+ years. Used for skinning wires, opening boxes and packages, and whatever. By the time I left each ship, I usually had most of the other officers carrying folders because they would see me using mine all the time and they would realize a knife was just a very useful tool.
I also kept a KA-BAR and a Camillus Pilot's Knife in my stateroom in my sock drawer. Would pick up different knives that were allowed to be brought back. Couldn't bring back a lot of cool working knives from the various Asian countries due to funky customs regulations.
I think I still have the old SS lock blades lying around somewhere. Now I carry at least 2 locking Bucks (USA versions) and a fixed blade daily. When working in the barns or around the farm or out camping/hiking, I carry two fixed blades. People ask me "why 2 blades". If you're right handed and you carry a knife on the right side AND your right hand/arm gets entangled in something, you better have something on the left side.
ZZZ