I have been able to get a CTD while in a SingleMission with a Tambor dated March 1st, 1942 after sinking an Otari and then spinning the Sonar head. However, I did not have to spin to the Otari, which had not fully sunk yet, but instead got the CTD when the sonar head spun to the sub's screws... We'll have to dig deeper here. Be back in a while with more, but we do still want more details on what you have goldmastersims, please. Thanks