Garmin GPSMAP A12 Owner's Manual

Also see for GPSMAP 7400 Series: Owner's manual Owner's manual Installation insrtuctions Owner's manual Installation instructions

Contents

Garmin GPSMAP A12 Owner's Manual Manual pdf 18 page image

Symbol DescriptionTarget is activated. The target appears larger on the chart. Agreen line attached to the target indicates the heading of thetarget. The MMSI, speed, and direction of the vessel appearbeneath the target, if the details setting has been set to Show.If the AIS transmission from the vessel is lost, a messagebanner appears.Target is lost. A green X indicates that the AIS transmissionfrom the vessel is lost, and the chartplotter displays amessage banner asking whether the vessel should continueto be tracked. If you discontinue vessel tracking, the losttarget symbol disappears from the chart or the 3D chart view.Dangerous target in range. The target flashes while an alarmsounds and a message banner appears. After the alarm hasbeen acknowledged, a solid red triangle with a red lineattached to it indicates the location and the heading of thetarget. If the safe-zone collision alarm has been set to Off, thetarget flashes, but the audible alarm does not sound and thealarm banner does not appear. If the AIS transmission fromthe vessel is lost, a message banner appears.Dangerous target is lost. A red X indicates that the AIStransmission from the vessel is lost, and the chartplotterdisplays a message banner asking whether the vessel shouldcontinue to be tracked. If you discontinue vessel tracking, thelost dangerous target symbol disappears from the chart or the3D chart view.The location of this symbol indicates the closest point ofapproach to a dangerous target, and the numbers near thesymbol indicate the time to the closest point of approach tothat target.NOTE: Vessels being tracked with the Blue Force Trackingfeature are indicated with a blue-green color regardless of theirstatus.Heading and Projected Course of Activated AISTargetsWhen heading and course over ground information are providedby an activated AIS target, the heading of the target appears ona chart as a solid line attached to the AIS target symbol. Aheading line does not appear on a 3D chart view.The projected course of an activated AIS target appears as adashed line on a chart or a 3D chart view. The length of theprojected course line is based on the value of the projectedheading setting. If an activated AIS target is not transmittingspeed information, or if the vessel is not moving, a projectedcourse line does not appear. Changes in the speed, course overground, or rate of turn information transmitted by the vessel canimpact the calculation of the projected course line.When course over ground, heading, and rate of turn informationare provided by an activated AIS target, the projected course ofthe target is calculated based on the course over ground and therate of turn information. The direction in which the target isturning, which is also based on the rate of turn information, isindicated by the direction of the barb at the end of the headingline. The length of the barb does not change.When course over ground and heading information are providedby an activated AIS target, but rate of turn information is notprovided, the projected course of the target is calculated basedon the course over ground information.Activating a Target for an AIS Vessel1 From a chart or a 3D chart view, select an AIS vessel.2 Select AIS Vessel > Activate Target.Viewing Information about a Targeted AIS VesselYou can view the AIS signal status, MMSI, GPS speed, GPSheading, and other information that is reported about a targetedAIS vessel.1 From a chart or a 3D chart view, select an AIS vessel.2 Select AIS Vessel.Deactivating a Target for an AIS Vessel1 From a chart or a 3D chart view, select an AIS vessel.2 Select AIS Vessel > Deactivate.Viewing a List of AIS and MARPA Threats1 From a chart, select Menu > Layers > Other Vessels > List> Show.2 Select the type of threats to include in the list.Setting the Safe-Zone Collision AlarmBefore you can set a collision alarm, you must have acompatible chartplotter connected to an AIS device or radar.The safe-zone collision alarm is used only with AIS and MARPA.MARPA functionality works with radar. The safe zone is used forcollision avoidance and can be customized.1 Select Settings > Alarms > Collision Alarm > On.A message banner appears and an alarm sounds when aMARPA-tagged object or an AIS-activated vessel enters thesafe-zone area around your boat. The object is also labeledas dangerous on the screen. When the alarm is off, themessage banner and audible alarm are disabled, but theobject is still labeled as dangerous on the screen.2 Select Range, and select a distance for the safe-zone radiusaround your vessel.3 Select Time To, and select a time at which the alarm willsound if a target is determined to intersect the safe zone.For example, to be notified of a pending intersection 10minutes before it will likely occur, set Time To to 10, and thealarm will sound 10 minutes before the vessel intersects thesafe zone.4 Select MARPA Alarm, and select an option for when thealarm sounds for MARPA-tagged objects.AIS Distress SignalsSelf-contained AIS distress signal devices transmit emergencyposition reports when activated. The chartplotter can receivesignals from Search and Rescue Transmitters (SART),Emergency Position Indicating Radio Beacons (EPIRB), andother man overboard signals. Distress signal transmissions aredifferent than standard AIS transmissions, so they appeardifferently on the chartplotter. Instead of tracking a distresssignal transmission for collision avoidance, you track a distresssignal transmission to locate and assist a vessel or person.Navigating to a Distress Signal TransmissionWhen you receive a distress signal transmission, a distresssignal alarm appears.Select Review > Go To to begin navigation to thetransmission.AIS Distress Signal Device Targeting SymbolsSymbol DescriptionAIS distress signal device transmission. Select to see moreinformation about the transmission and begin navigation.Transmission lost.Transmission test. Appears when a vessel initiates a test oftheir distress signal device, and does not represent a trueemergency.Transmission test lost.10 Charts and 3D Chart Views