High freqs on Collins nav unit
Hi!
In some of our aircraft and on some Collins NAV/LOC/ILS units we're able to tune VHF NAV freqs up to 136Mhz. First it's the normal 108-117ish, but if you continue to twist the knob is starts on 135(?) and goes on to about 137 before it starts at 108Mhz again.
I've heard about special Australian VOR's, but does anyone know about this function, and if, any use?
rgds