I don't know a damn thing about that file, but I'll take a stab at it.
I would imagine that MinElevation and MaxElevation refer to the angles at which the hydrophone can hear, but I'm not sure how to interpret them.
If we take Webster's notion as a starting point, with zero being the bow, 90 straight down, and 180 the stern, the resulting arc would be really bizarre. The ship would be deaf to anything in front of it vertically, and deaf to anything behind it laterally.
If, however, we take zero to be the stern, 90 to be down, and 180 the bow, then it still seems weird. The ship would be able to hear anything within 130 degrees of the bow laterally, and anything an arc that extends from the surface to slightly behind the hydrophone.
Hmm. Are you looking at a really late war unit?
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