What is YOUR plan if swept off your boat?

Here's an idea I'm not sure of.

Someone once mentioned carrying a length of thin line in your PFD pocket as a tether. Let's say you go overboard and get separated from your boat. I can't see waiting for the mythical helicopter when land is only 2-3 miles away so you decide to swim for land. Since productive swimming is nearly impossible in a PDF, take it off and tie it to yourself and tow it as you swim in. You'd still have it nearby if you got tired but now you can swim a powerful crawl and do the distance without getting exhausted in the bulky PFD. The only other options are to NOT swim or to abandon the PFD completely.

Does this sound sensible? It's easy to implement. Eight feet of line in your pocket. Make the call at the time.