Trying to understand my beamwidths. Below is the descriptions from HB for the same transducer.   
(XT 14 20 HDSI T)  HD SI, HD DI, Dual Beam, 20/60/90/180 degrees-  200/83/455/800khz 
(ONIX)  HD SI, HD DI, Dual Beam, 20/60/75/45/(2)86/(2)55 degrees-  200/83/455/800khz 
What degrees corresponds with which khz?