INEOS Team GB in America's Cup Anarchy Posted 16 hours ago 13 minutes ago, enigmatically2 said: It does, it crossed my mind its another of those "interpretations". Imagine a self-tacking job with 2 cars, but when you tack and one moves, there is a manual intervention needed to switch to the other car. But this manual intervention is of the switch-flicking type. Thus its not self-tacking. Or its a continuous track with one car, but it is driven across by hydraulics when someone flicks a button. Again its not self-tacking Something like that. No different from some of the interpretations that have been played before I'm going to suggest the simplest option- It's two tracks that allow in/out adjustment side to side. they still have to tack the jib onto the new sheet lead through the opposite car. And besides, isn't the mast step somewhere in the middle there. in the video showing their b1 mock up, you could see their floating lead arrangement- so they must have decided that a in/out car was a superior option than a full floating lead.