19.2 Sonar module range
Range capabilities of Raymarine transducers/sonar channels are shown
below.
Transducer / sonar channel
Range
RealVision™ 3D (3D Vision)
0.6 m (2 ft) to 91 m (300 ft)
SideVision™
0.6 m (2 ft) to 91 m (300 ft)
each side
DownVision™
0.6 m (2 ft) to 183 m (600 ft)
CHIRP sonar channel (when using
RealVision™ 3D, SideVision™ or DownVision™
transducers
0.6 m (2 ft) to 274 m (900 ft)
CHIRP sonar channel (when using
RealVision™ Max 3D transducer.
0.6 m (2 ft) to 366 m (1,200 ft)
Traditional 600 W sonar
0.9 m (3 ft) to 914 m (3,000 ft)
CHIRP 1 kW sonar
0.9 m (3 ft) to 914 m (3,000 ft)
Traditional 1 kW sonar
0.9 m (3 ft) to 1,524 m
(5,000 ft)
CHIRP 2 kW sonar
0.6 m (2 ft) to 3,048 m
(10,000 ft)
Note:
Stated ranges are for optimum conditions and are dependent upon
connected transducer.
Sonar minimum depths
Accurate bottom tracking can be unreliable in depths shallower than
0.8 m/2.62 ft. When operating at or below this depth be cautious of
misleading sonar returns, false bottom tracking and incorrect depth readings
The Minimum sonar depth alarm is triggered when your vessel reaches or is
in water shallower than this depth.
Below are examples of the Sonar app when it is tracking a false bottom in
shallow waters.
1.
Examples of incorrect depth readings due to false bottom tracking.
2. Actual bottom tracking and water depth.
3.
False bottom tracking providing false depth readings.
19.3 Fishfinder app overview
The Fishfinder app displays a visualization of the echoes received from
a Sonar module and transducer. The Fishfinder app is compatible with
Traditional, CHIRP, DownVision™, SideVision™ and RealVision™ 3D sonar
modules and transducers. The Fishfinder app builds an underwater view of
bottom structure and targets in the water column.
Multiple Sonar modules can be connected at the same time. Sonar modules
can be internal (built-in to your MFD) or external (a separate box on your
network).
For each instance of the Fishfinder app you can select which Sonar module
and channel that you want to use, the Sonar module and channel selection
will persist over a power cycle.
The Fishfinder app can be displayed in both Fullscreen and splitscreen app
pages. App pages may consist of up to 4 instances of the Fishfinder app.
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