Humminbird 363 - Manual (Page 92)

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Sonar
Sonar deactivates Sonar and removes the Sonar Views
from the view rotation. (Off, On, Default = On)
To turn Sonar on or off:
1. Highlight Sonar on the Setup menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the Sonar to On or
Off (Off, On, Default = On).