Originally Posted by
ShotOne
the excellent yachting rescue knives made by Gerber (no I don't work for them) which, while razor sharp, (designed for hi tech fibre like dyneema so goes through paracord like spaghetti) have a rounded tip which won't easily puncture a raft.
But think back to the original dinghy knife. It had a flame orange handle, a curved blade perforated along its short concave curved length and terminated in a properly rounded end. If you were tempted to test its sharpness you would cut your finger.
Of course its main purpose was to cut the painter from your sinking machine.