The Poseidon Battleship is a UEF naval unit. It is equipped with 3 batteries of direct-fire cannons, and 4 anti-air batteries. It can also be upgraded with anti-missile systems. Even though it seemingly has more anti-air batteries and health than the Mastadon Cruiser, the individual missiles are very weak, making the Mastadon a better choice for anti-air. The Poseidon is the most powerful non-experimental naval ship in the game.
The Poseidon has a set of 3 triple barreled Gauss Cannons. When the Stacked Gauss Cannon research is unlocked, these will be replaced by a set of 3 6-barreled Gauss Cannons, effectively doubling the damage output of the Poseidon.
- Use it to soak up damage intended for other weaker naval units, such as Mastadons.
- The front and rear cannons can aim independently at two different targets, when firing at just one target the ship itself will turn so both sets of guns can aim.
- The radar and vision upgrades greatly improve the Poseidon's land bombardment capabilities.
- The weak anti-air make the Poseidon very vulnerable to aircraft.