So Cobra customer suuport is Good....
It should e they have a lot of Practice..
mates boat nxt to you could not hear.... ok not helpfull info....
Was there No Audio, No RF Signal or Both ??
As said get something Decent... Icom, SH, Lowrance or Garmin. My Preference is in the order there written
ICOM been in the Business Donkey's years, and used by comercial and miltary not just Marine.
SH again been around forever good kit
Lowrance, quite new to RF invented leisure Sonar and great Plotters.
Garmin new guy's on the Block in the RF world.
Just my twopenneth worth based on Yerars of R & D in RF..