Playable surface ships in SP missions possible?

[EPinniger]

I've heard that SH4's multiplayer mode allows one team to control the escorts and merchants (with the option for a Destroyer Command-style bridge view) whilst the other team controls the attacking subs.

Is it possible, therefore, to create (using the mission editor) single-player missions where the player is in control of a destroyer or other surface vessel? I'd assume that this is possible (you could create missions in SH3 where the player's unit was a ship, but it would crash the game when the mission loaded, as the engine did not support player control of surface vessels) but just wanted to check first.

I'm mostly interested in playing surface ships rather than subs, and other than Destroyer Command there aren't really any decent WW2 warship sims available - so being able to create DC-style missions in SH4 would be interesting. (Though I'm thinking of buying SH4 anyway)