Federation Army Special Ops Battleship VIXIV IV

Federation Army Special Ops Battleship Vixin IV is a large battleship piloted by Adam Malkovich in Chapter 12 and 16 of Metroid: Volume 2. It leads a large fleet to Zebes to rescue Samus, Kuritsu, Mauk, and Platinum Chest, it is implied later that the ship also destroys the Space Pirate Flagship, causing Ridley to seek revenge on Adam.

It is also seen fighting against the Space Pirate Mother Ship later, in which it tries to stall Ridey from warping to Zebes. Knowing that it would mean reinforcements for the Space Pirates of Zebes which would stop Samus being able to complete her Zero Mission. While Ridley is able to escape, the fate of the Vixin IV is not stated. However it may be implied that the crew and possibly the ship survived as Adam is still alive years later at the time of Metroid: Other M.

Metroid: Other M
It is possible that the ship depicted in a flashback in the game is the Vixin IV, but this is never confirmed. The ship is seen above a planet with a mysterious spacecraft that has a drive unit attached. Inside the latter is Ian Malkovich, repairing it. Once it goes critical, Adam orders it to be detached, despite everyone's protests.