The Fishfinder Display - Raymarine GPM400 Reference Manual

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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