there could be many classes of each ship type,
i.e. 3 hit battleship can take 2 damage, and cost 27
2 hit battleship, 1 damage, cost 20
3 fighter carrier, 2 hit, 1 damage, cost 24
2 fighter carrier, 1 hit, cost, 14
a battleship hit’s at 4, until it is reduced to 1 hit
battle cruiser, 2 hit’s 1 damage, cost 17
if you develop the super submarine tech, your standard sub cost is reduced by 1
fast destroyer’s, move 3, cost 12,
heavy transport, capacity doubled, cost 12,
if a ship has to be repaired, which i think they should, they can not attack make a combat move when damaged,
they must return to a shipyard, and pay 1 i.p.c. per damage, or stay at the shipyard for 1 turn,
ship’s at a shipyard can not be attacked, except by s.b.r. which can increase the cost of repair by the number that is rolled on the dice
the playing pieces could be easily made distinguishable by placing a control marker beside each uprated ship