19.1 Fishfinder overview and features
The Fishfinder application uses a sonar module
and a suitable sonar transducer. The sonar module
interprets signals from the transducer and builds
up a detailed underwater view. Various sonar
technologies are available, all of which work on the
same basic principles.
The sonar transducer sends pulses of sound waves
into the water and measures the time it takes for the
sound waves to travel to the bottom and back. The
returning echoes are affected by bottom structure
and by any other objects in their path, for example
reefs, wrecks, shoals or fish. The Sonar module
interprets these signals and builds up a detailed
underwater view which is displayed in the Fishfinder
application.
The Fishfinder application uses colors and shading
to indicate the strength of the returns. You can use
this information to determine the bottom structure,
the size of fish and other objects in the water, such
as debris or air bubbles
Note:
• Some transducers include additional sensors to
measure water temperature and/or speed.
• Not all Sonar modules can be used for a source
of depth information.
Sonar technology
Traditional sonar technology
•
Traditional sonar
technology
CHIRP
technology
•
CHIRP technology
DownVision™
technology
•
CHIRP DownVision
TM
overview
SideVision™
technology
•
CHIRP
SideVision™
overview
Fishfinder features
Supports multiple, active
sonar modules.
•
19.4 Multiple sonar module
support
Create custom channels.
•
19.6 Custom channels
Fishfinder application panes.
•
Fishfinder application
panes
Pausing and adjusting the
speed of the scrolling image.
•
19.10 Fishfinder scrolling
Using waypoints to mark
fishing spots or target
locations.
•
19.15 Waypoints in the
Fishfinder application
Determining target depths
and distances.
•
19.14 Depth and distance
Setting Fishfinder alarms
(fish, depth or water
temperature).
•
19.17 Fishfinder alarms
Fishfinder display modes
(Zoom, A-Scope or Bottom
Lock).
Note:
The display modes
available are dependent on
the sonar channel / module
being displayed.
•
19.11 Fishfinder display
modes
Depth range controls (manual
or automatic)
Note:
Not applicable
to
SideVision
TM
sonar
modules.
•
19.8 Depth Range
Distance range controls
Note:
Only applicable
to
SideVision
TM
sonar
modules.
•
19.9
SideVision
TM
Range
Sensitivity Settings to help
optimize and simplify the
displayed image.
•
19.16 Sensitivity settings
Fishfinder screen
The Fishfinder application displays a scrolling
image across the screen of the water under your
vessel. Each Fishfinder application pane can be
independently configured to show a different sonar
module / frequency.
Example CHIRP screen
Example DownVision
TM
screen
Example SideVision
TM
screen
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