• Mobile App For Android Now Online!

    Download it here. The app is searchable in the Google Play Store under Sailboat Owners.

    Sorry iPhone/iPad users, we are still waiting on Apple. :(

    Click the X in the upper right corner to make this go away

What is this under vberth...


Dec 2, 2018
Catalina 30 Vancouver, BC
Just discovered a large amount of water under the vberth. There was a hole to run a hose to the bilge but was plugged. Even so though, hole was not low enough to empty the area of water build up. I thought the water may be coming from the anchor locker, but it's not.

Question is, when emptying the area there was a device that I'm really unsure it's function and cannot find online, so posting it here.

Thanks for the help.



Oct 22, 2014
CAL 35 Cruiser Portland OR, moored EVERETT WA
The item is manufactured by AirMar. They make transducers. It could be a sonar transducer or a paddlewheel/Speed transducer. By the look it I am guessing Sonar for your depth sounder. You’ll be able to tell when you haul the boat and look at the bottom.
  • Like
Likes: Jdtran