Eagle Electronics FISHMARK 640C - Manual (Page 90)

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Digital Data/Chart
Customizing the Digital Data/Chart Screen
The Digital Data/Chart screen can be customized to show digital data
different from the defaults first shown. To customize this screen:
1. From the Sonar Page (in Digital Data mode), press MENU |
↓ to
C USTOMIZE
| ENT .
The Sonar Menu (left) showing the Customize command highlighted.
The Water Speed box is selected at right