Garmin GPSMAP 182 User Manual

64
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 63). ‘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.
• Distance, Speed and Elevation— lets you select the desired units of measure for distance, speed and
elevation readouts in ‘Nautical’ (nm, kt, ft), ‘Nautical’ (nm, kt, m), ‘Statute’ (mi, mh, ft) or ‘Metric’
(km, kh, m) terms.
• Depth— lets you select the desired units of measure for depth in Feet (ft), Fathoms (fa) or Meters
(m).
• Temperature— lets you select the desired units of measure for temperature in Fahrenheit (°F) or
Celsius (°C).
Comm (Communications) Tab— lets you control the input/output format used when connecting your
GPSMAP 182/182C/232 to a GSD 20 Sonar Module, external NMEA devices, a DGPS beacon receiver, a
personal computer, another Garmin GPSMAP 182/182C/232, etc. Note: If a DGPS receiver is used, WAAS
capability will automatically be turned to ‘Off’. See pg. 87 for wiring and NMEA version information. The
unit supports two input/output ports. Individual Port settings are:
Port 1—
• GARMIN Data Transfer— the proprietary format used to upload/download MapSource data, exchange
waypoint, route, track, almanac, and proximity data with a PC or another Garmin GPSMAP 182/182C/
232. When you select ‘GARMIN Data Transfer’, there are 11 Transfer Modes to choose from: Host,
Request Almanac, Request Proximity, Request Routes, Request Tracks, Request Waypoints, Send Almanac,
Send Proximity, Send Routes, Send Tracks and Send Waypoints.
,
You may manually enter a
magnetic variation.
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
182C Manual Part 2.indd 64 6/4/2003, 2:54:19 PM

Garmin GPSMAP 182 Specifications