Évaluations - 2, GPA: 4 ( )

Fabricant : Garmin Taille : 4.56 mb Nom Fichier : Langue d'enseignement:

Lost MARPA target Closest point and time of approach to dangerous MARPA target Dangerous Tracking MARPA target MARPA target Acquiring MARPA target MARPA Targeting Understanding the Radar Overlay Screen Use the Radar Overlay option to overlay radar information on the Navigation chart. Radar range From the Home screen select Radar > Radar Overlay. The radar picture appears in orange and overlays the Navigation chart. Use the RANGE (+/-) keys (GPSMAP 4000 series) or the and keys (GPSMAP 5000 series) to zoom in and out. Zooming while panning the map only affects the zoom scale of the map. The radar range remains the same. Zooming while the map is locked on the boat (not panning) affects the zoom scale of the map and the radar range. To access additional settings or options for the radar overlay screen, select Menu. Select Setup > Chart Setup to access the chart options. Select Radar Setup to return to the radar setup options. Obtaining Optimal Radar Display Performance The gain controls the sensitivity of the radar receiver. The default setting for the gain, Auto, adjusts the gain automatically to provide the best performance. To adjust the gain: 1. Select Menu > Gain on the radar screen. 2. Select Up or Down to manually adjust the gain; select Auto to return the gain to the default setting. 42 GPSMAP® 4000/5000 Series Owner’s Manual Using Radar Reducing Unwanted Noise There are several options that adjust the gain to help reduce unwanted clutter on the radar screen. To reduce unwanted noise: 1. From the Radar screen, select Menu > Noise Rejection. 2. Select from the following options: • Rain Cltr—adjust the gain for unwanted clutter caused by rain at close ranges. Select Up or Down to adjust the rain clutter sensitivity. • Sea Cltr—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. • Cross Talk—filter out interference caused by another radar operating in close proximity. • FTC (Fast Time Constant)—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: • (GPSMAP 4000 series) On the Radar screen, use the ROCKER to move the pointer to the VRM/EBL target location and select Drop VRM/EBL. • (GPSMAP 5000 series) On the Radar screen, touch the target location and 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 (GPSMAP 4000 series) or touch the target location (GPSMAP 5000 series). 3. Press DONE to accept the changes. Configuring Other Vessels on the Radar Screen You can configure which other vessels are displayed on the radar screen, from the Radar screen, select Menu > Other Vessels. NOtE: To configure AIS or DSC information for other boats, your unit must be connected to an external AIS or DSC device. List—display a list of AIS and MARPA threats. Select Show to select between displaying AIS or MARPA threats, or All Threats. DSC—turn DSC (Digital Selective Calling) trails on or off, configure how many hours a trail for a DSC vessel is displayed on the Radar screen, or display a list of tracked DSC vessels. Collision Alarm (AIS and MARPA only)—turn a safe zone around your boat on or off. This is used for collision avoidance, and can be customized. GPSMAP® 4000/5000 Series Owner’s Manual 43 UsingRadar UsingRadar Using Radar To customize safe-zone settings: 1. From the Radar screen, select Menu > Other Vessels > Collision Alarm. 2. Select from the following options: • Range—change the measured radius of the safe zone ring to a specified distance from 500 ft. to 2.0 nm (or from 150 m to 3.0 km, or from 500 ft. to 2.0 mi). • Time to (Safe Zone)—sounds an alarm if AIS or MARPA determines that a target will intersect the Safe Zone within the defined time interval (ranging from 1 to 24 minutes). Display Setup—configure how other vessels are displayed on the Radar screen. • Display Range—set the distance from your location that AIS vessels are displayed. • Details—show or hide details for each vessel. • Proj. Heading—set the projected heading time. • trails—set the number of minutes that trails for vessels that you are position tracking (page 51) are displayed on the Radar screen, or turn trails off. Advanced Radar Configuration To access advanced radar settings, from the Radar screen, select Menu > Radar Setup. Rotation ...

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