Man those mark 48 adcaps have steering capability. Use it !!!!!
Launching a torpedo and hoping for the best is not the best tactics.
You have to look at broadband and narrowband to see when and where the HAN launches the countermesures, eventually you will triangulate the position of the countermesure so has to have a precise fix on the HAN. Before the torpedo enters a zone plenty with countermeasures, disable the sensors so that the mk 48 won't be spoofed. Once the cm are behind the torpedo, reenable it. In the meantime you'll continue to refine your TMA and steer the torpedo on the most currrent solution.
Ps: 2 torpedoes should be more than enough to sink the HAN.
Expending 13 torpedoes is just preposterous. What are you going to do when instead of the HAN you'll go up against an Akula 2 ?
