Done a uni joint like you did Ritchie. Not a good feeling. Glad you got in alright.
I was only 700 meters out to sea when mine parted after a jump. I ended up putting the windward harness line under my front foot strap. Kinda blew / drifted in like a bluebottle. Worked quite well, chugged along at 3 knots or so, but it still took me 45 minutes dragging my ass for sharks before I got in.
My new approach is- Buy the very best gear I can afford, replace all ropes regularly, and I don't sail anywhere I can't swim or walk home from. Bit restrictive, but nice and safe.
Geo, I do like the phone idea better than a marine radio. Just get the number of the local marine rescue mob, and put it in the phone. At least you can go on Seabreeze whilst your waiting for help to arrive