Ok
Objective Sink the BB and the 3 CV's.
Ready all your tubes forward and set depths at 8 to 11 ft. Hi speed. Drop your rear tubes to Hi Speed and shallow depths say 4 5 ft. All detonaters on MAg Contact.....
Open allyour tubes as soon as you can, Run down to 9ft and edge slightly more north at Flank to intercept. Set tube one to Hi speed and shallow if a DD seems to be to curious. You can sink them with a shallow hit that lifts them and breaks their keels.
Cut up to periscope depth when close in and line up the first carrier, give it two tubes and then two tubes for the BB. Swing left and run to line up the remaining CV's. As soon as possible slam a rear tube onto the BB. It will likely sink if not give her a second.
Meanwhile watch for the CA's as they are good target for a depp set tube at 9 ft or so. Drop a few Countermeasures to confuse the DD's and change your direction north again. Use your rear tubes to reak havoc on the last CV. Notw it's fun time and simply line up on targets of oppertunity.
Remember there are two BB's in that remote flotilla approaching so if you shake the DD's go deep and reload for the battle with them.
Good luck