I have an 1199 linked with a helix 9. when running at high speed I sometimes lose my 2d sonar and it defaults to read at 1.9 ft. It does not happen all the time and when it does it starts working again after a short period of time. I do have my transducr glassed into the hull of my ranger boat. It is connected to my 1199 unit and linked into the helix.
Any ideas