Re: Harness and Tether Recommendations?
I only use one all the time when sailing at night or with demanding weather.
I rarely use a PFD, normally when I think conditions demands it I use an harness.
I would point out that if you go out of the boat and stay clipped to it, the PDF is not going to help you (it has been cases where it is the opposite) and unless you have luck and a very strong crew you are done (or at least it is what has been happening).
Regarding the options, the right one is to have the jack line well inside the boat (and not normally were they are used, between cleats) and having a short double tether. On the last years, after several accidents with people dying going overboard connected to tethers, their length diminished drastically on the European market. From 1.5m average they have now about 1m, maybe just a little bit more. More difficult to use but certainly safer.