Garmin GPSMAP 232 User Manual

Page 74

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 deﬁned magnetic variation:

1. With the “Heading” ﬁeld set to ‘User Mag Var’, highlight the heading reference ﬁeld (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