[geoschmo]

Sorry, I forgot one thing. There is a way you might be able to coordinate you attack, but it's not foolproof. If both of your fleets have the same speed you could give them both "move to" orders and pick a spot equal distance from both of your fleets. Even if this means moving one of the fleets away from the enemy at first. Then give both fleets the attack order and they will move together and attack at the same time.

They won't be in the same fleet, so if one fleet is trained and the other isn't, only the ships in the trained fleet will get the combat bonuses.

Also, an important thing to note is this doesn't work right when minefields are concerned. Minesweeping seems to be handled differently then combat, so if you try this and mines are a possibility you need to have minesweepers in both fleets.

And this may or may not be possible to pull off depending on the positions of the two fleets and the enemy fleet, but in certain situations it's useful.