Garmin GPSMAP 8400 series Owner's Manual

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Garmin GPSMAP 8400 series Owner's Manual Manual pdf 32 page image

4 Select Angle 2, and select the new location for the secondangle.5 Select Done.Adjusting the Radar RangeThe range of the radar signal indicates the length of the pulsedsignal transmitted and received by the radar. As the rangeincreases, the radar transmits longer pulses in order to reachdistant targets. Closer targets, especially rain and waves, alsoreflect the longer pulses, which can add noise to the Radarscreen. Viewing information about longer-range targets can alsodecrease the amount of space available on the Radar screen forviewing information about shorter-range targets.• Select to decrease the range.• Select to increase the range.Tips for Selecting a Radar Range• Determine what information you need to see on the Radarscreen.For example, do you need information about nearby weatherconditions or targets and traffic, or are you more concernedabout distant weather conditions?• Assess the environmental conditions where the radar is beingused.Especially in inclement weather, longer-range radar signalscan increase the clutter on the Radar screen and make itmore difficult to view information about shorter-range targets.In rain, shorter-range radar signals can enable you to viewinformation about nearby objects more effectively, if the rainclutter setting is configured optimally.• Select the shortest effective range, given your reason forusing radar and the present environmental conditions.Zooming In and Out of the Radar Screen• Pinch two fingers together to zoom out.• Spread two fingers apart to zoom in.• Drag the screen to pan, and then select or to zoom, ifnecessary.Marking a Waypoint on the Radar Screen1 From a radar screen, select a location.2 Select on a combination screen or Create Waypoint on afull screen.MotionScope™ Doppler Radar TechnologyThe GMR Fantom radar uses the Doppler effect to detect andhighlight moving targets to help you avoid potential collisions,find flocks of birds, and track weather formations. The Dopplereffect is the frequency shift in the radar echo due to the relativemotion of the target. This allows for instant detection of anytargets moving toward or away from the radar.The MotionScope feature highlights the moving targets on theradar display so you can navigate around other boats or severeweather, or toward fishing spots where birds are feeding at thesurface.The moving targets are color-coded so you can tell at a glancewhich targets are heading your way and which are headingaway from you. On most color schemes, green indicates thetarget is moving away from you and red indicates the target ismoving toward you.Enabling a Guard ZoneYou can enable a guard zone to alert you when anything comeswithin a specified area around your boat.NOTE: This feature is not available in dual radar modes.From a radar screen, select Menu > Radar Options >Enable Guard Zone.Defining a Circular Guard ZoneBefore you can define the boundaries of the guard zone, youmust enable a guard zone (Enabling a Guard Zone, page 24).You can define a circular guard zone that completely surroundsyour boat.1 From a radar screen, select Menu > Radar Options >Adjust Guard Zone > Adjust Guard Zone > Circle.2 Select the location of the outer guard zone circle.3 Select the location of the inner guard zone circle to define thewidth of the guard zone.Defining a Partial Guard ZoneBefore you can define the boundaries of the guard zone, youmust enable a guard zone (Enabling a Guard Zone, page 24).You can define the boundaries of a guard zone that does notcompletely surround your boat.1 From a radar screen, select Menu > Radar Options >Adjust Guard Zone > Adjust Guard Zone > Corner 1.2 Touch and drag the location of the outer guard-zone cornerÀ.3 Select Corner 2.4 Touch the location of the inner guard-zone corner Á to definethe width of the guard zone.5 Select Done.Disabling a Guard ZoneYou can disable a guard zone.From a radar screen, select Menu > Radar Options >Adjust Guard Zone > Disable Guard Zone.The guard zone configuration is saved, so you can enable itagain when needed.MARPAMini-automatic radar plotting aid (MARPA) enables you toidentify and track targets and is primarily used for collisionavoidance. To use MARPA, you assign a MARPA tag to atarget. The radar system automatically tracks the tagged objectand provides you with information about the object, including therange, bearing, speed, GPS heading, nearest approach, and24 Radar