It depends on the length of your "passage". Most production powercats have a range of about 1000 miles at a "slow" cruising speed. Using one
engine you can double that - but you are going pretty slowly. With
fuel bladders on
deck you can obviously extend that. Since all cats are quite weight sensitive, carrying lots of
fuel handicaps performance much more than large fuel
tanks on a traditional
monohull powerboat.
As far as seaworthiess,
Leopard delivers many of the powercats it builds in
Cape Town on their own bottoms -- even to
Australia.