- "Crikey! That ship is bloody huge!"
- —Unknown UPEO peacekeeper
The OFS Dimetrodon (BB-797) is a Yamato-class Battleship. It is one of the most powerful ships in the Osean Maritime Defense Force.
The OFS Dimetrodon was built in 1942 in the Kimomatsunai Naval Arsenal. Originally named the HIUMDS Kono, it was the main ship of the Kono subclass. As a part of the Osean-Usean Military Exchange Program of 2009, the Kono was given to Osea in exchange for 5 Lockheed Martin F-35Cs. The ship was renamed Dimetrodon to the fit Osean naval naming tradition of naming battleships after prehistoric animals.