he has studied a bunch of MOB situations and believes that nearly all of them involve falling over after reaching the workstation, then attempting to use two hands to work. The premise is that while you are moving, you are careful and holding on, but when you get to where you are going, you need both hands to work. Therefore he recommends making sure you have a good place to hook a short tether at any place you are going to work, and when you move about just hang on.

I think there is a lot of merit in that. Trying to move up and down the deck dragging a tether hooked to a jackline had a certain danger to it, even on my boat, which has almost singularly clean decks - no jib tracks, no shrouds, no turnbuckles, nothing but wide clean side decks. You hang out of the cockpit to hook on which often took two hands. You drag the tether with the danger of it hanging up or tripping you. It is also slow, increasing your exposure.