Tetra-class

Originally intended as a sturdy transport ship specializing in planet-to-colony shipments, the advent of the 6MW saw a need for a method to deliver some of the more specialized AAA squadrons to colony fighting grounds. The Tetra-class was refitted to be more geared to combat, housing a hefty 16 max AAA capacity. An addition of several point-defense turrets meant that it could defend itself against AA and missiles alike.

The Tetra is short, fat, and wide. The hull is composed of three ovular structures welded together. The center one is thinner than the two connecting hulls that surround it, which are bulky and fat. Four fins poke out from these hull, two on each side. The ship is surprisingly smooth, getting progressively larger the closer you get to the end of it, which immediately flattens out and creates a large array of thrusters.

Its design means the front half is somewhat smaller than the back half, and in turn the bridge is also the central head of the ship. The Tetra-class requires a minimum crew of only thirty, and while lacking a launch ramp, they can simultaneously prepare and launch at least four AA.

During the months following up to the Christmas War, the ESU radically refitted their Tetra-class fleet, changing many of them to be able to carry an experimental long-range rail cannon. Instead of sporting a large hangar, the ship class now sports at minimum four long-range rail cannons, two on each side of the ship. These cannons can field kinetic ammunition at both an incredibly long range and with high accuracy, additionally, they can be difficult to predict and avoid.

Refitted Tetra-class, or Mark IIIs, now compose a bulk of the defensive operations of the ESU. Their collection around the moon and the main ESU defensive fleet is what stops the MR from being able to make a concentrated push into Earth.