Chapter 5: Sonar Mode Operation; Introduction - Raymarine DSM300 User Manual

Chapter 5: Sonar Mode Operation

Chapter 5: Sonar Mode Operation

5.1 Introduction

Basic operation, including a description of the different display options, was given
in Chapter 4. This chapter explains how to use the display unit to show sonar
data. It describes how to fine-tune the image and use the controls to get
additional information.
Note: This chapter describes using the DSM300 Digital Sounder Module with a Rayma-
2
rine hsb
Series or E Series display are available in the handbooks for those products.
This chapter covers the following topics:
• Interpreting and Adjusting the Sounder Image, including fish and bottom
indications, using the white line feature and adjusting gain (sensitivity)
• Viewing Data Windows
• Setting up and Using Alarms for fish, shallow water and deep water
• Using a VRM to Determine Depth and Distance from Boat to a particular spot
• Placing Waypoints
• Using the Man Overboard (MOB) function
Note: The settings described in this chapter are retained when the unit is powered off.
However, there is a one-minute delay from the time you change the setting to when the
DSM300 places it in memory. If you power down the sounder less than one minute after
making a change, the setting is lost.
Many of the parameters on the DSM300 have both manual and automatic modes.
The automatic setting takes advantage the hardware's advanced digital
technology. As a result, the sounder typically performs better in automatic mode
than in manual. For better performance, Raymarine recommends that you select
AUTO mode wherever it is an option.
PLUS (Pathfinder) Series display. Instructions for operating the DSM300 with a C
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