There are quite a few candidate power catamarans that could do what we want (see Buying a boat (background) ). This page goes through many of the options we looked at (and discarded).
To remind us all, our requirements are:
- ability to go through canals of France and Europe
- ability to go to different cruising areas, especially Mediterranean, Great Loop (USA), Pacific NW, Asia, Australia-NZ
- power catamaran
It turns out that the hardest part to find is narrowness (<5m) and air height (<3.4m) for French canals, combined with size for ocean crossings. Almost everything else can be found in various combinations.