Leading the drogue lines to abreast the boat's turning point enables the transom to more easily turn, according to the author. If you've ever tried to tow a heavy boat while sitting in a dinghy or runabout you can tell how much easier it is to steer and turn when holding the tow line amidship rather than fastened to the transom. That is a really interesting concept to apply to the problem of steering a boat without a rudder.