hi guys, just thought id add a reply...
well we all understand that hf and vhf are line of sight. i always understood the calculation to be
1.25*sq root transmitter height(ft) + 1.25*sq root a/c height=dist nm.
so 1.25*sq rt 16000ft + 1.25* sq rt 120ft= 171.80694.
171.80nm.
hope this helps guys and please correct me if im wrong.
cheers davey