Garmin GPSMAP 4212 User Manual Page 52
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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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- 4000 Series 1
- Introduction 3
- Table of Contents 4
- Getting Started 5
- Turning on the Chartplotter 6
- Turning Off the Chartplotter 6
- Adjusting the Backlight 7
- Adjusting the Color Mode 7
- GettinG 8
- Viewing System Information 8
- Using the Simulator Mode 8
- Understanding the Home Screen 9
- Using Charts 10
- Navigation Chart Settings 11
- Understanding Chart Data 11
- Panning the Navigation Chart 12
- Data Bars 14
- Changing the Chart Appearance 15
- Using Perspective 3D 16
- Using Tracks 17
- Using Radar Overlay 17
- Using BlueChart g2 Vision 19
- Using Mariner’s Eye 3D 20
- Using Fish Eye 3D 21
- Using Fishing Charts 22
- Viewing Aerial Photos 23
- Detailed Road and POI Data 24
- Using Automatic Guidance 24
- Using Combinations 25
- Where To? 27
- Creating and Using Waypoints 29
- Creating and Using Routes 31
- Viewing Information 33
- Viewing Celestial Information 34
- Viewing User Data 34
- Viewing the DSC List 36
- Viewing Engine Gauges 37
- Viewing Fuel Gauges 37
- Viewing Video 38
- Conguring the Device 39
- Conguring Units of Measure 40
- ConfiGUrinG 41
- Setting Alarms 42
- Conguring My Boat 43
- Conguring Other Vessels 44
- Conguring XM Audio 45
- Using the Marine Network 46
- Using Radar 48
- Using Cruising Mode 49
- Using Sentry Mode 49
- Radar Targeting 50
- Adjusting the VRM and EBL 52
- Advanced Radar Conguration 53
- Using Sonar 54
- Understanding the Temp Log 55
- Setting Up Sonar 56
- Advanced Sonar Settings 57
- Adding a DSC Contact 58
- Receiving Distress Calls 59
- Position Tracking 60
- Calling an AIS Target 61
- SinG Xm 62
- Using XM 63
- Viewing Sea Conditions 65
- Viewing Fish Forecasting 67
- Using XM Audio 69
- Appendix 70
- NMEA 0183 and NMEA 2000 71
- Capturing Screenshots 72
- Messages and Alarms 73
- Product Registration 77
- Contact Garmin 77
- Declaration of Conformity 77
- Weather Data Warranty 77
- Software License Agreement 78
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