... I see my father at 77 he is in great shape but i'm wondering if
around 70s it is still feasible.

I've followed the Dashews for the last 20 years and to see them go onto
powerboating while they had the biggest and most weather built sailboat has
been a shock to me.

The Dashews will do what works for them, and so should you. I have a
friend in his mid 70's who sails his 40 foot boat from New Zealand to
New Caledonia and back every year. He takes crew along for the
passages and his wife flys but they run the boat themselves when on
soundings and he is always very much in command. I've met lots of
folks in their 60's who do similar things or are working on
circumnavigations or long cruises. So, it is certainly something that
people can do late in life and you can probably make it happen, too, if
you want to. Of course, cruising in a motor boat can be nice or you
might want to join a chess club with a view of the ocean or whatever...


-- Tom.