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Garmin GPSMAP 441s Owner's Manual - Page 68

Split Zoom, Noise Reject, Manual, Frequency

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Using Sonar • Split Zoom-displays the Split Zoom screen (page 58). Noise Reject (available only when Gain is set to Manual)-reduces on-screen visual clutter (usually from electrical sources) on the screen. Select the top slider bar to manually adjust the value of noise rejection. Manually adjusting the amount of noise that is rejected helps fine-tune the sonar to show the most detail with the least noise. When Frequency is set to Dual (and Gain is set to Manual), you can individually adjust noise rejection for each frequency. 62 GPSMAP 400/500 Series Owner's Manual

Section	Page
Introduction	3
Tips and Shortcuts	3
Manual Conventions	3
Quick Links	3
Declaration of Conformity (DoC)	6
Product Registration	6
Contact Garmin	6
Getting Started	7
Unit Overview	7
Turning the Unit On or Off	8
Initializing Unit Settings	9
Adjusting the Backlight	10
Using the Keypad	11
Acquiring GPS Satellite Signals	11
Using Simulator Mode	11
Viewing System Information	12
Restoring the Original Factory Settings	12
Inserting and Removing SD Cards	12
Understanding the Home Screen	13
Using Charts	14
Using the Navigation Chart	14
Changing the Navigation Chart Settings	18
Using the Split Navigation Chart	21
Using Perspective 3D	21
Using Mariner’s Eye 3D	22
Using Fish Eye 3D	24
Using Fishing Charts	25
Enabling High Resolution Satellite Imagery	25
Viewing Aerial Photos	26
Animated Tide and Current Indicators	27
Detailed Road and POI Data	27
Using Automatic Guidance	28
Using the Chart/Sonar Screen	28
Automatic Identification System	28
Where To?	34
Navigating to a Destination	34
Creating and Using Waypoints	36
Creating and Using Routes	37
Using Tracks	39
Using BlueChart g2 Vision	40
Navigating with a Garmin Autopilot	41
Viewing Information	42
Viewing a Compass	42
Viewing Numbers	42
Viewing Trip Information	43
Viewing and Customizing Engine Gauges	43
Viewing and Synchronizing Fuel Gauges	46
Viewing and Customizing Wind Gauges	47
Viewing Tide-station Information	48
Viewing Current Information	49
Viewing Celestial Information	49
Viewing User Data	50
Viewing Other Vessels	53
Configuring the Chartplotter	54
Configuring System Settings	54
Configuring Units of Measure	54
Changing the System Language	55
Configuring Navigation Preferences	55
Configuring Communications Settings	57
Setting Alarms	58
Setting the Total Fuel Onboard Alarm	60
Configuring My Boat	60
Configuring Other Vessels	62
Using Sonar	63
Understanding the Full Screen	63
Understanding the Flasher Screen	63
Understanding the Split Frequency Screen	64
Understanding the Split Zoom Screen	64
Understanding the Depth Log Screen	65
Understanding the Temp Log Screen	65
Setting Up Sonar	66
Advanced Sonar Settings	67
Using Digital Selective Calling (DSC)	69
Using the Chartplotter with a VHF Radio	69
Adding a DSC Contact	70
Viewing the DSC List	70
Receiving Distress Calls	70
Man-Overboard Distress Calls Initiated from a VHF Radio	71
Man-Overboard Distress Calls Initiated from the Chartplotter	71
Position Tracking	71
Placing an Individual Routine Call	72
Calling an AIS Target	73
Using XM WX Weather and Audio	74
Using XM WX Weather	74
Viewing NEXRAD Precipitation Information	75
Viewing Forecast Information	78
Viewing Fishing Information	79
Viewing Sea Conditions	80
Viewing Visibility Information	81
Using XM Audio	82
Appendix	83
Specifications	83
Alarms and Messages	85
Capturing Screenshots	88
Caring for the Unit	88
Weather Data Warranty	89
Software License Agreement	90
XM Satellite Radio Service Agreement	90