I just wanted to point out there are other options besides Steam.
https://www.amazon.com/Dangerous-Wat...AW5BE2224A1P4F
If a torp has already aquired you in DW your options are limited. Drop counter measures, change depth and heading, go to flank and keep your fingers crossed.
Its much better to jink as soon as you hear the launch transient. One move I've used in the past is to jink
towards the transient bearing and offset it about 30-45 degrees. You're changing the bearing rapidly and also closing on the platform that launched at you, hopefully you can put the torp behind you and travelling in the wrong direction when it goes active.

This is kind of the opposite of a "side step" where you change heading but try to put some distance on the other sub.