Though I do not understand the calculations (some kind of shorthand). I do agree that Focus Fusion could power a ship or WIG-ship (Wing-In-Ground effect).
Fission is already powering submarines, aircraft carriers and icebreakers. Focus Fusion could take over the nautical niche.
I have also thought about FF-powered locomotives, WIG-trains and propeller-driven aircraft. However, trains and planes do crash, and the reactors would be radioactive from side-reactions. It may be possible to design reactors to survive a crash intact.
