has anyone ever made a asw mission? is it possible or worthwhile?

Do you mean anti-sub warfare?

If so I believe you can't sink submerged subs, there was a topic on this recently in General Discussion.

I don't think some of the planes used for anti-sub warfare are flyable (at least without mods) like the Catalina.

i did some tinkering and a pby loaded with 1000 lbers. can get a target destroyed message, although I had 2 pbys bombing the same sub.

If the sub is submerged you can sink it, but it requires you doing the same amount of damage as is necessary to sink a surfaced submarine. This doesn't sound so hard until you realise that the target is effectively just the periscope. Any munition or blast effect that doesn't hit the periscope is considered a miss.

yeah, not alot of room for error but trying to keep the missions fresh and exciting

It takes an unrealistically large bomb and a VERY accurate hit to kill a submerged sub...you cant skip bomb a periscope!The most likely scenario I have used is flying the modded B24 in a RAF coastal command skin attacking a Milch Kuh (Milk Cow refuelling sub )with one or two ,maybe even three subs 'parked' around it .Unfortunately the defensive aa fire is savage ...The 16x500lb loadout will take out 8 surfaced subs potentially but I dont know would it be possible to even get one submerged one.I needed minimum SC1800(kg) to sink a submerged sub

at AAA today there is a new WIP mod using the X missile...radio guided....could probably work??