The ion drive delta boat was a nautical craft was used by Zaphod Beeblebrox on Damogran the day that he stole the Heart of Gold. It is directed by means of a primitive steering wheel system, and it is supported just above the water by a hazy cushion of ionised atoms. Nonetheless, it has fin blades that can be lowered into the water for the purpose of creating amazing water displays for show. It is, therefore, superbly suited for use by the President of the Galaxy, being comparably flashy and essentially unnecessary.