Reposting the Ekaterina for reference.
We need to go naval now, massive advantage is an hard beast. Their fleet is full of ships large enough to be torpedoes and an ekaterina should be able to do great damage. However, to be effective it would have to be paired with a torpedo revision, dolphin is too small and short ranged.
A benefit of making a cruiser instead would be having the revision available to do something that can help us regain land (like a better autocannon which we can later mount on TURBOHAAST)
UF-GEV-41 "Ekaterina
This is a plane with short, stubby wings. By all rights it shouldn't fly, and in fact it employs an aerodynamic effect known as ground effect to boost its lift and reduce drag, by staying close to the surface.
To retain stability in this region, it uses a T shaped tail, on which a single powerful turboprop engine is mounted.
The aircraft itself is fairly small but has 2 crewmembers: a pilot and a gunner for the Sorraia turret.
Besides the turret the only other weapon it carries is torpedo mounts. Thanks to the reduction in guns, armor, plus the more powerful engine, combined with the benefits of ground effect, should allow it to lift 3 or 4 tons of torpedoes in its tubes.
This strange plane is meant to be deployed as a motor torpedo boat, using its great speed to avoid enemy artillery while it deploys its payload.
Being airborne, it is significantly faster than any boat we could ever deploy.
For the joy of some engineers, it floats when not airborne.