When you level up a ship leader, it says he can command ships up to: "battleship" "battleship+" Steam post with image .. https://steamcommunity.com/app/984680/discussions/0/3801651941326459962/ One of these has a plus sign and the other doesnt. Same thing with lower class ships.
1 Frigate, 2 Frigate+ etc 1-10 command levels based on total experience if hes level 2 he gains additional experience in battle in a frigate, but only as long as hes at level 2. If hes level 7 he gets additional experience when commanding a battleship etc. Leaders can/will also request combat in a ship type for which they have the command class (but are Not currently commanding) and will get additional bonuses for that ship type should they fight a battle in that type. Eg: Leader Command level 4 currently in a destroyer may request to fight a battle in a Cruiser, theres no time limit on this request.
