You would do better if you ask under the mod that's in question.
The revolving view of the Observation Scope ST Radar can be fixed by opening the Optical Targeting Correction mod (take it out of "Activation" within JSGME), go through folders Data/Library/USSubParts/...open the "Sensors_sub_US.sim" file using S3D.
Drill down to the node: 34/35. Uncheck the Boolean "Value" for "Revolving =", setting it to False. Save the file.
You should note that the ST radar doesn't pick up a darn thing when the sub is submerged. All the effort to getting it operational..... putting it into the game, goes for nothing. The game doesn't recognize the ST scope as radar. To check for yourself, go to periscope depth. Pop up the Observation scope, then go to one of the Radar Station screens......they won't turn "on". Their deft as a post. It
will work if you put the conning tower above water, but what's the advantage of that over the other radar antennas?!
The game doesn't recognize the Observation scope head as radar (even though it will spin like a top when using the view). The game has many things "hard coded" that aren't controllable by us (math formulas, stadimeter parameters, how or what gets saved when asked), the "switch" telling the game to recognize the Observation scope head as radar isn't set. The game has only one depth setting for radar use, that's with at least the conning tower raised above the water. Raising only the ST radar above water doesn't mean a thing.