In my humble opinion, done all wrong. A line to a
halyard and pull VERY GENTLY on the top of his
mast straight sideways into the deeper
water of the channel. The little
fishing skiff could probably have easily done it. As the stuck
boat heels, the
keel just lifts off the bottom and away you go. Negligible risk of damage. Just make sure there is deep enough
water in that direction. I have a piece of
electrical tape around my
boat hook at 6'(Scorpius's draft) and I use it to sound around the boat. If the tape goes underwater we'll be able to float there. We went aground seven times one day in
Belize and got off easily each time.
For a towing
bridle I just run one of my stern lines (3/4"D) from one stern "cleat" (they are more like
samson posts - welded in. I could probably pick Scorpius up with any one of them) outside the transom to the other - then put a bowline around that line with the stern
anchor rode (300' of 5/8" three strand nylon) and tow away from the middle of my transom. Works like a charm.