So you are using Ralles ModPack then? Where is your submarine located at 20:00 hours on the 9th of May when you get the CTD? In other words, anything resembling a GPS coordinates or something like "250nm southwest of Pearl" or whatever. Also, are you looking at the NavMap, on the Bridge, at the Periscope, or does it seem to matter? I have both Ralles, TMO & TMO + RSRDC active, and I can look through any of my installs for clues.