The RMS-192M Zaku-Mariner, based on the Zeon MS-06M Zaku Marine Type from the One Year War, was created by the Earth Federation during Mobile Suit Gundam ZZ. With significant enhancements, this powerful Mobile Suit surpassed its Zeon predecessor in both surface and underwater combat. However, Neo Zeon managed to capture all units of the RMS-192M Zaku-Mariner before the Federation could deploy them in battle.