A tank would amount to little more than an additional secondary battery, and a small one at that.
Tanks were never meant to fight ships, although I imagine that they could take on boats... too bad that the air component is missing, as planes can carry bombs/torpedoes that can penetrate the hulls of a ship.
Regardless, the most likely scenario for combined naval/ground forces would be to have ground versus ground during which naval attempts to provide artillery support while also contending with opposing naval forces...
ShipxPanzer!
■ National Tournament!!
Ship × Panzer! The Tankery Combined Firepower National Tournament is now open!!
Boom Boom Honk Honnnk
This tournament will consist of three challenges: tankery battles, fleet-girl battles, and integrated firepower battles. The first of each school to win two of the three is the victor!
Our school has Haruna-san's group on our team!
Today will be the national tournament's opponent lottery!We have some heartening allies! We won't lose to the other schools! And our first-round opponent is...!