Garmin GPSMAP 4212 User Manual

48 GPSMAP 4000 Series Owner’s Manual
Using Radar
USinG
radar
Obtaining Optimal Radar Display Performance
The gain controls the sensitivity of the radar receiver. The default setting for the gain is Auto; this
setting adjusts the gain automatically to provide the best performance.
To adjust the gain:
1. From the Radar screen, select Menu > Gain.
2. Select an option to adjust the gain:
To return the gain to the default setting, select Auto.
To manually adjust the gain, select Up or Down.
Reducing Unwanted Noise
There are several options that adjust the gain to help reduce unwanted clutter on the Radar screen.
1. From the Radar screen, select Menu > Noise Rejection.
2. Select an option:
Select Rain Cltr to adjust the gain for unwanted clutter caused by rain at close ranges. Select
Up or Down to adjust the rain clutter sensitivity.
Select Sea Cltr to adjust the gain for clutter caused by choppy sea conditions. Select Rough,
Medium, or Calm. Select Up or Down to manually adjust the sea clutter sensitivity.
Select Cross Talk to lter out interference caused by another radar operating in close
proximity.
Select FTC (Fast Time Constant) to reduce unwanted clutter caused by rain at a distance.
FTC has four presets: Off, Low, Medium, or High.
Adjusting the VRM and EBL
The Variable Range Marker (VRM) and Electronic Bearing Line (EBL) tools measure range and
bearing to a target. You can adjust the diameter of the VRM and the angle of the EBL.
To show or hide the VRM and EBL:
The measured range and bearing are displayed in the upper-left corner of the screen.
If the VRM and EBL are hidden, from the Radar screen, select Menu > Show VRM/EBL.
If the VRM and EBL are shown, from the Radar screen, select Menu > Adjust VRM/EBL >
Hide VRM/EBL.
To select the VRM/EBL target location:
1. On the Radar screen, use the Rocker to move the pointer to the location you want to set the
VRM/EBL marker.
2. Select Drop VRM/EBL.
To adjust the VRM/EBL target location:
1. From the Radar screen, select Menu > Adjust VRM/EBL > Move VRM/EBL.
2. Use the Rocker to move the pointer to a new location for the marker.
3. Select Done.
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Garmin GPSMAP 4212 Specifications

General

Sport (fitness, running)	No
Marine (chartplotters, sounders)	Yes
Live service	-
Routes quantity	20
Number of waypoints	1500
Map view options	3D
Form factor	Fixed
Display diagonal	12.1 \
Display resolution	1024 x 768 pixels
Display size (HxV) (imperial)	7.3 x 9.7 \
Compatible memory cards	SD

Weight and Dimensions

Depth	117 mm
Width	376 mm
Height	241 mm
Weight	4500 g