Humminbird 580 - Manual (Page 79)

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Map Datum
(Advanced)
Map Datum allows you to change the map coordinate system used by the
Fishfinder to match those of a paper map. The Map Datum menu choice is
only available when User Mode is set to Advanced (see Setup Menu Tab:
User Mode).
To change the Map Datum setting:
1. Make sure you are in Advanced User Mode, then highlight Map Datum
on the Navigation main menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the Map
Datum setting. (Default = WGS 84)
Set Simulation Position
(Advanced)
Set Simulation Position allows you to set the position of the boat used in the
Simulator. The Set Simulation Position menu choice is only available when User
Mode is set to Advanced (see Setup Menu Tab: User Mode).
To set the Simulation Position:
1. Activate the cursor and move it to the coordinates from where you
want the simulation to start.
NOTE: The cursor must be active in order for this procedure to work.
2. Make sure you are in Advanced User Mode, then highlight Set
Simulation Position on the Chart main menu.
3. Use the RIGHT 4-WAY Cursor Control key to change the Simulation
Position setting. A confirmation dialog box will appear to allow you to
change your mind, or to confirm your choice. If the cursor was not
active before you began this procedure, you will see an error message.
Exit the menu, set the cursor, then try again.