Spot Soundings; North Reference; Grid Rotation - Humminbird 500 SERIES 580 Operation Manual

soundings, which are depth measurements shown on the chart.
NOTE: Spot Soundings are only available with optional-purchase MMC/SD cards.
To change the Spot Soundings setting:
1. Highlight Spot Soundings on the Chart main menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the Spot
Soundings setting. (Hidden, Visible, Default = Hidden)
displayed with one of two orientations: True North or Magnetic North.
To change the North Reference setting:
1. Highlight North Reference on the Navigation main menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the North
Reference setting. (True, Magnetic, Default = True)
the trolling grid in degrees, where a setting of 0° displays a standard North, South,
East, West alignment. See Waypoints for information on how to set a Grid.
To change the Grid Rotation setting:
1. Highlight Grid Rotation on the Navigation main menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the Grid
Rotation setting. (0° to 89°, Default = 0°)

Spot Soundings

Spot Soundings allows you to display or hide spot

North Reference

North Reference allows you to have bearings

Grid Rotation

Grid Rotation allows you to set the orientation of
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