Hi there:

IJN is a torpedo and bomber nation, due that a 11 aircraft 11 bomber could be a good option for your Sub, they become inmune to AA nearly 95 with 100 vets an many experts even earlier. Don't forget to put the TB in the first slot from left to right, idk why but if you put the plane in other slot he can't be inmune to AA.

About the use, are very very usefull for scouting or sink a moribund ship after the volley of torps due the lack of the rear tubes, use wisely don't waste em at the begining, they are tactical planes. 

Cya, cheers from Chile. 

Hi,
i use them in the ss5 and the ss5.5 and work excellent. I personally try to sink an enemy sub or damaged from the beginning of the battle. After that swift strike I go and finish the damaged sub if did survived the TBs (3-4 TBs can take care ss4s and below, with SS5 and ss5.5 it depends on the ammount of bulge they carry, SD, etc.). With 4 EBVE engineers you will have plenty OH, in the gun-slot I use a rep, so you have a "balanced" crew (OH, rep rate, etc.). YOu should read the IJN sub guide in this section, you will find more interesting info.

Best regards,

Aderezo 

Thanks a lot for the information I was hoping it would be useful and I think it will be fun.

I have read the guide here and researched about the IJN line, just could not verify if the planes were usefull, I am glad they are!

I cant find this info anywhere: for IJN SS5, does the Torpedo Bomber need to be at level 98 to use the tb's? and should i late class from tb to torp sq?