Along with the knife, sheath, and sharpening stone, the knife was also issued with a thin but strong nylon cord. Sometime I saw a few pages from a manual that had drawings about a survival pack that included a one-man life raft. The end of the paddle had a socket built into it that the hex pommel of the survival knife would fit into. As the story goes the knife could be secured to the end of the paddle with the cord provided, and the two holes in the guard were provided to expedite that. This way the knife/paddle could be utilized together. Like a spear or digging stick.