Complex sentence: One other risk of these miss-fires was what is called "hot running" where the torpedo would run in its tube, though the warhead could not detonate the motor would overheat and explode without water to cool it, sending shrapnel across the deck.
Split into simpler sentences: One other risk of these misfires was what is called "hot running", where the torpedo would run in its tube. Though the warhead could not detonate, the motor would overheat and explode without water to cool it, sending shrapnel across the deck.