I'm pretty sure everyones thinking "Shut up about the wave and noise factors already!"
Forgive me, but im compelled to think aloud for a minute. Maybe it will help.
If you look at the forumlas
http://www.mistari.com.au/shiii/shii...r_Formulas.htm
Noise factor has ALOT to do with how fast your moving your boat. Primary factors are Engine RPMS.
Wave factor has ALOT to do with how high are the waves and how high an object is.. (what object i dunno, probably the DD)
So heres my thought out loud.
Just how much of the subs noises do i want the DD's to hear, and just how far do i want them to hear it on a (clear/stormy) day?
Im gonna shut up and give it a rest now. :rofl: