Superships

Tier XI Superships - Located at the end of several tech trees, Superships represent the peak of their respective tech trees and feature new and unique mechanics. Captains must research three Tier X ships to gain access to Superships. Once unlocked, Superships can be obtained after researching their respective Tier X counterpart.

Superships require only 1 exp to research but cost large amounts of credits to purchase.

Super battleships: 57 million Credits.
Super carriers: 48 million Credits.
Super cruisers: 47.5 million Credits.
Super destroyers: 45 million Credits.

Notes on the economy of Superships:

Superships yield Credits at the level of Tier X ships.
The cost of servicing superships is 360,000 Credits.
Permanent camouflages for superships are purchased separately from the ships, just like for other researchable ships from the Tech Tree.
The permanent camouflage of superships does not reduce their service cost or increase their Credit earnings. However, it provides a larger XP bonus compared with permanent camouflages for Tier X ships.

Other information:

Superships do not interact with the Research Bureau and will not be sold after you reset a branch.
Tier IX and X ships will enter battles with superships with restrictions similar to the limits on the number of ships of different tiers and on the number of bottom-tier battles in Tier VIII–X battles. Single-tier battles involving only superships are also possible.
Superships are classified as “researchable” ships in the game. This means that Commanders must complete their retraining when they are assigned to superships.

See also: Official Wargaming Support Article