Suspect Depth Reading with C120W/DSM30/SS60

[Chuck - Raymarine - Moderator]

TideRace,

Q1. I'm assuming that there isn't one (beam angle configuration setting) in the DSM30 either.
A1. Raymarine's depth sounding products do not include this feature. Raymarine, as well as Airmar, Inc., offer 0 degree transducers as well as 12 degree and 20 degree tilted element transducers to support installation on hulls having 8-15 degree and 16-24 degree deadrise respectively in the location where the transducer will be installed. When a second through hull depth transducer is installed onboard a boat, the transducer would typically be installed on opposite sides of the keel (most common) or side by side. Install a depth transducer aft of another thru-hull transducer may expose the aft transducer to an aerated flow of water when the vessel is operating a planing speeds and speeds approaching plane. If the transducers are of the correct model for the amount of hull deadrise in the installation locations, and have been correctly oriented within the present installation location, then I would be inclined to simply note which of the two systems are providing the more accurate depth value when needing depth information.