On a serious note, I don't see why most sailors can't be sailing well into their 70s (unless they have a major pre-existing condition, as I do). Not only were my parents very physically active throughout their 70s but so were pretty much all of their peers and friends. When you hit 80, for more people than not, things start to break down. Nat's parents were lucky that they were able to continue sailing in their 80s. My take away message is: don't count on living a long and physically active life - act now while ye still can.

Jerry