What is matter with making your own jam? Ideal on a boat, all those long hours to leave it bubbling away, don't have the time to wait at home. Even better bramble jelly, freshly collected from the hedgerow.
Same goes for making bread.......on the boat you have time.
No, I am not in the WI (although I have thought about it!), probably a bit young as although I am not under 30, (so don't need to go out on the town, thank goodness, never did like that anyway!) I haven't quite reached the next milestone...but I have looked in the mirror recently!