This is a Improved Conquest Mode Vehicle Pack. It adds an AI WW1 Imperial German Battlecruiser SMS Derfflinger
https://en.wikipedia.org/wiki/SMS_Derfflinger
It requires Improved Conquest Mode 0.4 or higher.
https://steamcommunity.com/sharedfiles/filedetails/?id=2844333563
It uses a extended build bay, ~85M long, and unfortunately due to the casemate guns gives errors for physics shapes when it loads.
It has four twin Artillery Cannon turrets, and 20 Battle cannons in casemate mounts and two torpedo tubes.
It uses some AI logic from the Base ICM Corvette, and a lot from the Bismarck from the ICM WW2 pack.
https://steamcommunity.com/sharedfiles/filedetails/?id=2925200084
Most gun systems use Shairo-jp's Ballistic Calculator https://steamcommunity.com/sharedfiles/filedetails/?id=2628490430