I use this one:
Every tool has to be alone. Knives are for cutting. Including other tools to the same handle might be an easy way to carry them but using them is not. You may need a screwdriver and a plier for the removal of a machine screw.
Knives on board are needed for cutting and generally in an emergency. This knife can be carried easily, you can open it with one hand, the blade is long enough to cut a rope in one strike. The blade locks when you open it.