Humminbird NS 10 - Manual (Page 31)

Use up/down arrows to highlight EAST or WEST.
Press ENTER when the setting is correct. The SELECT LONGITUDE screen will be displayed
requesting a numerical coordinate.
Use the keypad to enter your numerical coordinate for longitude.
Press ENTER when the setting is correct. The SELECT SYMBOL screen will be displayed.
Note: It is not necessary to assign a symbol to a waypoint. Symbols simply help you remember
the purpose of a stored point.
Use the up/down arrows to choose a waypoint symbol.
Press ENTER when selection is correct. The SELECT NAME screen will be displayed.
It is not necessary to store a name with your waypoint, this is just another way to help identify a
certain stored point.