Humminbird 787c2i - Manual (Page 50)

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Add or Remove a Trolling Grid: From the Waypoints submenu, select Grid and
press the RIGHT Cursor key to display a list of waypoints. Select the waypoint
to which you want to add the grid. The trolling grid will appear on all of the
navigation views, and can be used as a guide when trolling around a waypoint.
The grid can be rotated to any desired heading using Grid Rotation from the
Navigation Main menu. To remove the trolling grid, choose Remove Grid from
the Navigation X-Press™ menu.
NOTE: Only one waypoint can have either a target or a grid at one time. If you apply a target
or a grid to a new waypoint, the original waypoint will lose its target or grid.
NOTE: The spacing of the rings on the waypoint target and the spacing of the grid lines on the
trolling grid is the same as the length of the scale bar on the left edge of the display. Zooming
in or out will decrease or increase the spacing, respectively.
Chart View with Grid
Waypoint
Trolling
Grid