 The EFN (EF Navy) developed the RAG-79-G1 as the G-4 project's marine type Gundam, yet it is only an upgrade of the RAG-79 Aqua GM for Ace pilots with just the head and generator changed.After the One Year War, the GP series are numbered after the RX-78 convention, despite being newly produced units.The variation among the Gundams was originally indicated by differences in colouration, indicating upgrades to completely internal equipment and technology, although later variants displayed externally visible upgrades.