Questions about using the special torpedoes

[K-61]

I am now playing in June, 1943 and thus have access to the special torpedoes, such as acoustic and ladder pattern. I have a few questions about them as I wish to ensure I use them to best advantage.

The acoustic torpedo seems simple enough, and in spite of not knowing what I am really doing I have enjoyed two kills against convoy escorts. My first question with the acoustics is what is the best depth and trigger to use with them? Should I set them with a magnetic pistol and to run under the keel, or should I set them shallower with an impact pistol? I know they are limited to 20 knots and thus are a waste to fire at a very fast ship.

When I launch, should I aim as I normally do, such as at the midpoint of the target vessel? I am wondering if it will sail for the impact point, or, as it gets nearer, go for the engines? Also, will it home in on the ship you actually targeted, or will it sail for any ship it hears? Last night I launched at a Bogue escort carrier second in line in the middle of a convoy and the torpedo tried to hit the shallower ship in front of it. I had the depth set to hit just under the carrier, but the torpedo headed for the ship in front and circled around trying to hit it until it ran out of fuel.

Do acoustic torpedoes change the depth at which you set them as they track? Do they actually try to detonate under the engines? I am wondering if they could be chopped up by the propeller of the target vessel and not detonate?

Also with the acoustic torpedoes, how do you guys suggest employing them? Should I aim for the beam of an escort broad-on to me, aim for his tail from behind, can I target him magnetically from any angle? Do you set them deep or shallow, impact or magnetic pistols? Are they good for "down the throat" shots set with a magnetic pistol to go off one metre under the vessel?

The "ladder" pattern torpedoes. I am assuming you target and fire them as normal, but if they miss they then begin to run their programmed search pattern. I would assume that in order to hit another ship if it missed the intended target, it would be a good idea to set a shallower depth so as not to fail to detonate if set too deeply with a mag-pistol. Can you program how long they run straight before the track, and can you determine which way they make their first turn and how far before they turn again?

The third one concerns the torpedo that I found in my stern tube. Sorry, forget the type number, but the notes say it is a good one to fire at warships attacking from behind. It appears to have a ladder pattern if it misses. Does this torpedo have any advantages to the others? Are there best ways or procedures to attack with this one?

Thanks to all who reply.