Question about sensors.txt file

[MrMojok69]

1) Do the frequencies have any effect on gameplay? Like where you see in the file one sonar model operates at VL,L,M,H frequencies while another is only L,M

2) If it says SonarBaffle=150, does that mean a 150 degree angle behind the boat?

3) What does the SonarNoisePerKnot value do?

4) Is SonarOutput basically the "strength" of the active sonar ping? How far you can "see" if you go active?