Any Tips For Sub Vs. Sub Battles?

I was playing the game and came across a mission unfortunately I can't remember which one but I sank a surface ship and then on my Btac I noticed an enemy sub. Does anyone have any suggestions for dueling it out sub vs. sub?

There's something already on forum .

Mainly it is using the spectator view.

I like sub-sub duels .

Watch out you don't fire from below 50 .

Easy to forget .

haha, i tried below 50, just to see what would happen.

glub glub glub