It's for a turn based space empire building 4X game. The major goal is reduction of micromanagement and makeing the player not thinking in terms of individual ships but whole formations.
Fleets
The player forms a fleet and appoints an admiral, it pops up on the home world and consists of one flotilla made of 4 squadrons (no actual ships yet). A fleet has a special crest, can have perks, experience, special trainings, unique abilities, history, officers, attached units, etc, etc. These are shared among all ships of the fleet. The player can have up to 8 fleets total.
Flotillas & squadrons
Fleet is an abstract thing, it does not appear on the map. Only flotillas appear and you move only flotillas. There are 4-12 squadrons in a fleet (at the beginning all in the first flotilla), you can split a flotilla anytime by deciding how many squadrons you want to move to the new flotilla. Flotillas can also merge anytime. But only flotillas OF THE SAME FLEET (can't merge flotillas of fleet A and fleet B).
How fleets are used (operational level)
The first flotilla of a fleet always houses the admiral (there is a star on that flotilla's icon) and it's the HQ of the fleet. Since a fleet can be divided into up to 12 flotillas it's quite a big and flexible formation able to conquer several systems simultaneously, the thing is all flotillas need to operate within a certain radius of the HQ flotilla (admiral) or face penalties (poor communication with the fleet commander). So, while you could move flotillas all over the map, in practice you want them to stick more or less together (like fleet A defends the north while fleet B defends the south).
Ships
I don't want the player to think in terms of ships, so these are never displayed on the map, also information about them is limited, also they are abstracted. To build a ship you go to fleet panel and click Build/Add (yes, inside a fleet, not a shipyard). Then a desired ship will be sent to that fleet from the nearest base or built and then sent (route is hidden/abstracted, they player can see only ETA). Similarly, if you want to remove a ship from a fleet you click Remove and that ship will be sent back to the base (you can't send it directly to another fleet, it first needs to go to the base where they will change the insignia on the hull to mach the insignias of the other fleet :D).
How ships are allocated within a fleet
The player has NO SAYING on how it's done, it's all automatic. All ships that are assigned to a fleet are redisributed evenly among all squadrons (the squadrons that have least ships getting them first). The player can only click on a flotilla and examine all squadrons (but can't do anything about it).
What you think?