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491 Echo Sounder Operations Manual Page 35
4Understanding Depth Settings
Viewing the seabed depth . . . . . . . . . . . . . . . . 4-36
Viewing the depth marker . . . . . . . . . . . . . . . . 4-36
Changing the depth settings . . . . . . . . . . . . . . 4-36
Setting the picture’s shift (starting depth) . . 4-37
Setting the picture’s range . . . . . . . . . . . . . . . . 4-38
This chapter explains how to override the system’s auto-
matic depth settings and manually control the depth range
shown on the screen, and how to use the depth marker.