Hi,
just two comments:
1. I know I repeat myself, but I would never judge a sensor's performance by a single parameter value without knowing the whole equation for the sensor's performance. Maybe a parameter has no influence if other parameters have certain values (e.g., you can create a fatigue model based purely on morale or stamina and in this case the stamina/morale (respectively) coefficients have no influence). And since so many paramters enter a sensor's performance equation, I'm sure there are quite a few paramter sets to obtain a certain result.
I'm convinced that modding sensors is one of the hardest things you can do because of all the parameters involved and the dependencies. Therefore, I regard it as absolutely necessary to test thoroughly. And I'm quite convinced that GWX has been tested well.
2. Concerning the influence of the sea floor: From my knowledge the influence of the sea floor on the detection probability varied a lot depending on the nature of it. At the moment it seems that you would always gain from the sea floor

Any plans to make this random so that sometimes you benefit from the sea floor and sometimes you don't?
Regards, LGN1