Eagle Electronics CUDA 350 S/MAP - Manual (Page 35)

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air bubbles in the fiberglass or the epoxy will reduce or eliminate sonar
signals.
Testing Determines Best Location
Ideally, the shoot-thru transducer should be installed as close to the
transom as possible, close to the centerline. This will give you the best
performance during high speed maneuvers.
Shoot-thru-hull transducer locations for
high speed or trolling speed operation.
To choose the proper location for shoot-thru-hull mounting, follow these
testing procedures: (You may need a helper to complete these steps.)
1. Anchor the boat in about 30 feet of water. Add a little water to the sump
of the boat. Plug the transducer into the sonar unit, turn it on, then
hold the transducer over the side of the boat in the water. Adjust the
sensitivity and range controls until a second bottom echo is seen on the
display. (You'll need to turn off Auto Sensitivity, Auto Depth Range and
ASP
™. Try a range setting that is two to three times the water depth.
The harder (more rocky) the bottom, the easier it will be to get a second
bottom signal.) Don't touch the controls once they've been set.
Transducer location
(trolling speed)
Transducer location
(high speed)