Chapter 3: Using The Sounder Module; Introduction - Raymarine DSM25 Owner's Handbook Manual

Chapter 3: Using the Sounder Module

3.1 Introduction

The standard fishfinder image is an historical, scrolling bottom graph at an
automatically selected range and frequency. Various functions are provided to
improve the underwater view, select what is displayed and sound an alarm
including:
• Change the range (Range)
• Shift the selected viewing range (Range Shift)
• View a zoomed area (Zoom)
• Flatten the bottom image to help separate fish from the bottom (Bottom
Lock)
• Show a "real time" image of fish and bottom structure directly below the
transducer (A-Scope)
• Change the size of the depth digit
• Isolate bottom fish using White Line and Bottom Fill
• Pause the scrolling image
• Set the frequency
• Manually adjust the sensitivity, color gain and time varied gain settings
• Use waypoints to mark positions
• Use fishfinder alarms (fish, depth or water temperature)
FISHFINDER
SETTINGS
BOTTOM
ZOOM
LOCK
A-SCOPE PRESENTATION
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