Humminbird 1157C - Manual (Page 179)

Sonar
Sonar deactivates Sonar and removes the Sonar Views from the view
rotation.
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).
Video Out
Video Out allows you to set the video format that will be sent to your
remote monitor.
To use the Video Out feature:
1. Highlight Video Out on the Setup main menu.
2. Use the RIGHT 4-WAY Cursor Control key to select the video format. (Domestic Models: NTSC,
Off; International Models: NTSC, PAL, PAL M, Off; Default = Off)
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