OK, as for The "New" Sound... If you run the mission I made where I always get the sound, but rename the Jap_Minefields.mis file to .bak or some other, there is NO sound that occurs. No matter what you do. If you run Stock with the mission that I'd made that I can always get the sound (mis file adjusted for Stock calls), I can NOT get the sound. There is a Jap_Minefields.mis file in stock, but there are no sub nets around Truk. My next task was to move the subnet on the East border of the Truk Lagoon, the portion of it that infringes on the 152° Longitudinal line, and no change. Still got The "New" Sound... so next I'm going to try to eliminate one element at a time from the Minefields file, and see if I can figure what it is. I'm also going through it with a text editor... maybe there's a "bad" call in it that doesn't show in the ME, but makes its presence known in the game...
It's gotta be something about 58-60 deep...