[TG] [TG11] RV100

[Tom - Raymarine - Moderator]

Hello Ryan,

Sorry, I probably didn't say so clearly enough - my comments were all about deep(er)-water performance. The sounder normally runs in Auto Gain where it continually adjusts the gain level in order to try show a clear picture and keep the noise clutter off the screen. If the noise level is too high then the system has to drop the gain so much in order to keep the noise off the screen that it ends up losing the bottom echo too. It's not that it can't hear the bottom echo but that it can't pick it out from amongst the noise, just like trying to have a conversation in a noisy pub. High background noise will always give poor performance, and the deeper the water (weaker the bottom echo) the worse the results are. I can't see any real noise problem in any of the channels except Low Chirp though, so I would expect you to get good bottom readings at speed in Medium Chirp - have you tried this?

The RV's high-Chirp Sonar channel is low power (compared to the TM265) and will always struggle more in deeper water than the TM265's channels will, that's normal.

Regards,
Tom