Knock down someone with your fists. For sailors in the golden age of sail that was one way to make your way up the ladder, seamanship would've been anotherway. The tougher the sailor, on a packet, the better able to keep other towing the line. That's really "toe on the line", make a Jack stand in bare feet with his toes alined with a deck plank & keep him there for how ever long with his toes always on that line. Barry