Fishfinder Introduction - Raymarine C140w User Reference Handbook

12.1 Fishfinder introduction

Warning: Sonar operation
• NEVER operate the sounder with the boat out of
the water.
• NEVER touch the transducer face when the sounder
is powered on.
• SWITCH OFF the sounder if divers are likely to be
within 25 ft (5 m) of the transducer.
Fishfinder overview
The fishfinder application provides a detailed view of the fish and
seabed under your vessel, enabling you to accurately distinguish
between different sizes of fish, bottom structure, and underwater
obstacles. The standard fishfinder image is a historical, scrolling
bottom graph with range and sonar frequency automatically selected
by the system.
The various functions and features of the fishfinder application
include:
• Preset modes for easy optimal operation.
• Display modes (Zoom, A-Scope or Bottom Lock).
• Adjustable range and zoom.
• Finding bottom feeding fish with the bottom lock display mode.
• Clutter and gain options to simplify the image.
• Pausing and adjusting the speed of the scrolling image.
• Using waypoints to mark a position.
• Determining depths and distances of targets.
• Fishfinder alarms (fish, depth or water temperature).
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Fishfinder screen
The fishfinder displays a scrolling image of the seabed, updating
from the right as your vessel makes progress.
Example fishfinder screen
The fishfinder window includes the following aspects:
• The bottom together with any bottom structure such as reefs and
shipwrecks etc.
• Target images indicating fish.
• A status bar noting the frequency and gain settings.
• The bottom depth.
Status icon
The fishfinder status icon is located in the top-right section of the
screen:
C-Series Widescreen user reference