deck gun rockets

i am thinking of making a mod where you play as U-9, U-19 or U24. these where the u boats that fired short range artillery rockets at soviet shore facilities.

here is the bit in THE MANUAL:

The Germans modified three submarines of the 30th Flotilla (U-9, U-19, and U-24) to carry short-range artillery rockets in the summer of 1944. Soviet shore facilities were allegedly attacked using these weapons, but with unknown effect (if any)

this mod depends on one thing, and that is whetheryou can make the deck gun fire rockets. there are six rockets or so it appears in the picture, so the magazine of the deck gun would have to be 6. imagine surfacing just outside of a base and silently launching the rockets at the ships and slowly sinking away.

any help is appreciated.

also can anyone tell me how to script aircraft into airbases?? because I have just acquired some great aircraft from denises AIRMOD 1,2 and 3. i could script them in but it would take a long time, so i would rather put them into airbases. i was trying to translate the russia readmes but when you put them through the translator it sounds a bit strange.