Ships not only use diesel for generators but for propulsion in general; many engines found in recreational mid and large motoryachts are basically truck diesel

Ships not only use diesel for generators but for propulsion in general; many engines found in recreational mid and large motoryachts are basically truck diesel engines adapted for a harsher maritime environment. Volvo Penta, Detroits, Caterpillar are very popular. Marine diesel is taxed differently and is somewhat cheaper than truck diesel (and has a different color due to a different dye added; marine diesel is red, truck diesel is yellow). Diesel is also safer than gasoline in terms of accidental ignition and explosion since the ingnition temperature is much higher than gasoline. Diesel fuel flash points vary between 52 to 96C (126 to 205F)