Holding bottom at high speed is a common problem with transom mounted fishfinder transducers, and location is usually the reason. Just yesterday, a friend who bought a new boat was asking me about this issue. The one problem he has with his new boat is a flaky bottom reading; at speeds over seven or eight mph, the fishfinder totally loses its grip.
Lowrance® Elite-7x CHIRP Fishfinder Without Transducer: CHIRP sonar with DownScanTM Imaging reveals bottom contours, structures and your prey like never before!
Joined: Thu Dec 29, 2011 10:10 pm
Location: Middleburg Florida
What the heck does that mean? A couple of things—this is why you can never read water less than about a half foot in depth (or in a bucket in your driveway, for that matter). This is actually the ‘dead zone’ itself. With most fishfinder transducers the dead zone extends about a half a foot down from the transducer. With medical or industrial transducers it’s incredibly more complicated with focused transducers, mosaic transducers and other stuff that you and I and the snapper don’t care about. Other qualities of this dead zone are you never know it happens because it happens hundreds or thousands of times a second and this zone actually camouflages the contact of the hull, plastic, goop or other material between the transducer face and the water column.
The Elite-5x CHIRP Fishfinder without Transducer includes the head unit only, making it perfect if you already have an Elite CHIRP Fishfinder / Sonar set-up and would like a "second station" to view sonar results.