Garmin GPSMAP 8500 Black Box Owner's Manual

Also see for GPSMAP 8000 Series: Owner's manual Quick start manual Instructions Owner's manual Installation instructions

Contents

Garmin GPSMAP 8500 Black Box Owner's Manual Manual pdf 19 page image

2 Select the location of the outer guard zone circle.3 Select the location of the inner guard zone circle to definethe width of the guard zone.Defining a Partial Guard ZoneYou can define the boundaries of a guard zone that does notcompletely encompass your boat.1 From the sentry screen, select Menu > Radar Menu >Sentry Setup > 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 todefine the width of the guard zone.Radar Targeting and MARPARadar targeting enables you to identify and track objects.Mini-automatic radar plotting aid (MARPA) is primarily used forcollision avoidance. To use MARPA, you assign a MARPA tagto a target. The radar system automatically tracks the taggedobject and provides you with information about the object,including the range, bearing, speed, GPS heading, nearestapproach, and time to nearest approach. MARPA indicates thestatus of each tagged object (acquiring, lost, tracking, ordangerous), and the chartplotter can sound a collision alarm ifthe object enters your safe zone.MARPA Targeting SymbolsAcquiring a target. Concentric, dashed green rings radiate fromthe target while the radar is locking onto it.Target has been acquired. A solid green ring indicates thelocation of a target that the radar has locked onto. A dashedgreen line attached to the circle indicates the projected courseover ground or the GPS heading of the target.Dangerous target is in range. A red ring flashes from the targetwhile an alarm sounds and a message banner appears. Afterthe alarm has been acknowledged, a solid red dot with adashed red line attached to it indicates the location and theprojected course over ground or the GPS heading of the target.If the safe-zone collision alarm has been set to Off, the targetflashes, but the audible alarm does not sound and the alarmbanner does not appear.Target has been lost. A solid green ring with an X through itindicates that the radar could not lock onto the target.Closest point of approach and time to closest point of approachto a dangerous target.Assigning a MARPA Tag to an ObjectBefore you can use MARPA, you must have a heading sensorconnected and an active GPS signal. The heading sensor mustprovide the NMEA 2000 parameter group number (PGN)127250 or the NMEA® 0183 HDM or HDG output sentence.1 From the Harbor, Offshore, or Cruising Radar screen, selectan object or location.2 Select Acquire Target > MARPA Target.Viewing Information about a MARPA-tagged ObjectYou can view the range, bearing, speed, and other informationabout a MARPA-tagged object.1 From a radar screen, select a targeted object.2 Select MARPA Target.Removing a MARPA Tag from a Targeted Object1 From the Radar screen, select a MARPA target.2 Select MARPA Target > Remove.Viewing a List of AIS and MARPA ThreatsFrom any Radar screen or the Radar overlay, you can view andcustomize the appearance of a list of AIS and MARPA threats.1 From a Radar screen, select Menu > Radar Menu > OtherVessels > AIS & MARPA List > Show.2 Select the type of threats to include in the list.Showing AIS Vessels on the Radar ScreenAIS requires the use of an external AIS device and activetransponder signals from other vessels.You can configure how other vessels appear on the Radarscreen. If any setting (except the AIS display range) isconfigured for one radar mode, the setting is applied to everyother radar mode. The details and projected heading settingsconfigured for one radar mode are applied to every other radarmode and to the Radar overlay.1 From a Radar screen or the Radar overlay, select Menu >Radar Menu > Other Vessels > Display Setup.2 Select an option:• To indicate the distance from your location within whichAIS vessels appear, select Display Range, and select adistance.• To show details about AIS-activated vessels, selectDetails > Show.• To set the projected heading time for AIS-activatedvessels, select Projected Heading, and enter the time.VRM and EBLThe variable range marker (VRM) and the electronic bearingline (EBL) measure the distance and bearing from your boat toa target object. On the Radar screen, the VRM appears as acircle that is centered on the present location of your boat, andthe EBL appears as a line that begins at the present location ofyour boat and intersects the VRM. The point of intersection isthe target of the VRM and the EBL.Showing the VRM and the EBLThe VRM and the EBL configured for one mode are applied toall other radar modes.From a Radar screen, select Menu > Radar Menu > ShowVRM/EBL.Adjusting the VRM and the EBLBefore you can adjust the VRM and the EBL, you must showthem on the Radar screen (page 13).You can adjust the diameter of the VRM and the angle of theEBL, which moves the intersection point of the VRM and theEBL. The VRM and the EBL configured for one mode areapplied to all other radar modes.1 From a Radar screen, select a new location for theintersection point of the VRM and the EBL.2 Select Drop VRM/EBL.3 Select Stop Pointing.Measuring the Range and Bearing to a Target ObjectBefore you can adjust the VRM and the EBL, you must showthem on the Radar screen (page 13).1 From a Radar screen, select the target location.2 Select Measure Distance.Radar 13