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Raymarine GPM400 - The Fishfinder

Raymarine GPM400
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8
Chapter 8: The Fishfinder
The fishfinder uses acoustic sounding to display fish, seabed structure, and underwater obstructions like
wrecks.
Chapter contents
8.1 The fishfinder display on page 92
8.2 Background information on page 92
8.3 Operating the fishfinder on page 92
8.4 Explaining the readout on page 93
8.5 Factors influencing the readout on page 93
8.6 Display mode settings on page 95
8.7 Presentation toolbar on page 101
8.8 Adjusting gain and power on page 102
8.9 Measuring depth and distance on page 103
8.10 Fishfinder alarms on page 105
8.11 Editing presets on page 105
8.12 Fishfinder configuration on page 107
See also…
The G-Series System Installation Guide for fishfinder calibration information.

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