you can't, there is no way to add naval units as of yet. what I do (and some people dont like it) is give extra fighter units to islands. since fighters can attack both land and sea they become in a way naval units.
also alternatively you can use bombers but these guys offsent the attack values on land by a lot so you gotta be careful
I added a fighter and bomber to my island. On my new map COLD WAR ASIA I wanted japan to have a navy, as US was quick reactionary force back then, transporting troops up and down asian coastline. But yea, since no navy I had to had aerial units inside.
you can't, there is no way to add naval units as of yet. what I do (and some people dont like it) is give extra fighter units to islands. since fighters can attack both land and sea they become in a way naval units.
also alternatively you can use bombers but these guys offsent the attack values on land by a lot so you gotta be careful
I added a fighter and bomber to my island. On my new map COLD WAR ASIA I wanted japan to have a navy, as US was quick reactionary force back then, transporting troops up and down asian coastline. But yea, since no navy I had to had aerial units inside.
yeah i hope they will add naval units soon. it will be fun to have massive naval battles.