Garmin GPSMAP 162 - Manual (Page 74)

65
Reference
Main Menu:
Units Tab
• Heading— lets you select the reference used in calculating heading information. You can select
from ‘Auto Mag Var’, ‘True’, ‘Grid’ and ‘User Mag Var’. ‘Auto Mag Var’ provides magnetic
north heading references which are automatically determined from your current position. ‘True’
provides headings based upon a true north reference. ‘Grid’ provides headings based on a grid
north reference (and is used in conjunction with the grid position formats described on page
64). ‘User Mag Var’ allows you to specify the magnetic variation at your current position and
provides magnetic north heading references based upon the variation you enter.
To enter a user defi ned magnetic variation:
1. With the “Heading” fi eld set to ‘User Mag Var’, highlight the heading reference fi eld (immediately
to the right) and press ENTER/MARK.
2. Use the ARROW KEYPAD to enter the magnetic variation at your current position and press
ENTER/MARK.
WARNING: If ‘User Mag Var’ is selected, you must periodically update the magnetic
variation as your position changes. Using this setting, the unit will not automatically
calculate and update the magnetic variation at your present position. Failure to update
this setting may result in substantial differences between the information displayed on
your unit and external references, such as a magnetic compass.
• Distance, Speed and Elevation— lets you select the desired units of measure for distance,
speed and elevation readouts in ‘Nautical’ (nm, kt, ft), ‘Statute’ (mi, mh, ft) or ‘Metric’ (km,
kh, mt) terms.
• Depth— lets you select the desired units of measure for depth in Feet (ft), Fathoms (fa) or
Meters (mt).
• Temperature— lets you select the desired units of measure for temperature in Fahrenheit (°F)
or Celsius (°C).
I
You may manually enter a magnetic
variation.