The link Brendan has provided to his illustrations doesn't work. My bad, some infomation I gave Brendan off the top of my head was almost correct but wrong.
Guys for heavens sake! Top tip... follow the tow truck even if he goes the wrong way...when he eventually stops renegotiate the plan. Talk about making it difficult just because someone thought it was a good idea to go his own way..never going to work is it? Clearly he's never done water-skiing. And if you have a towing eye what then?..can't imagine the outcome of going your own way will be pretty. Forgive my exasperation.