Garmin GPSMAP 800 Series Panduan Pemilik - Halaman 24
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Setting the Standby and Transmit Times
Before you can set the standby and transmit times, you must
enable timed transmit
(Enabling Timed
To help conserve power, you can indicate the radar standby
time and the transmit time to implement periodic radar signal
transmissions at set intervals.
1
From the sentry screen, select MENU > Sentry Setup.
2
Select Stdby Time.
3
Enter the time interval between radar signal transmissions.
4
Select Transmit Time.
5
Enter the duration of each radar signal transmission.
Enabling a Guard Zone
From the sentry screen, select MENU > Sentry Setup >
Enable Guard Zone.
Defining a Circular Guard Zone
Before you can define the boundaries of the guard zone, you
must enable a guard zone
You can define a circular guard zone that completely
encompasses your boat.
1
From the sentry screen, select MENU > Sentry Setup >
Adjust Guard Zone > Move Radar 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
the width of the guard zone.
Defining a Partial Guard Zone
You can define the boundaries of a guard zone that does not
completely encompass your boat.
1
From the sentry screen, select MENU > Sentry Setup >
Adjust Guard Zone > Move Radar Guard Zone > Corner
1.
2
Select the location of the inner-left guard-zone corner.
3
Select Corner 2.
4
Select the location of the outer-right guard-zone corner to
define the width of the guard zone.
Marking a Waypoint on the Radar Screen
1
From a Radar screen or the Radar overlay, select a location.
2
Select New Waypoint.
Viewing a List of AIS Threats
From any Radar screen or the Radar overlay, you can view and
customize the appearance of a list of AIS threats.
From a Radar screen or the Radar overlay, select MENU >
Other Vessels > AIS List.
Showing AIS Vessels on the Radar Screen
AIS requires the use of an external AIS device and active
transponder signals from other vessels.
You can configure how other vessels appear on the Radar
screen. If any setting (except the AIS display range) is
configured for one radar mode, the setting is applied to every
other radar mode. The details and projected heading settings
configured for one radar mode are applied to every other radar
mode and to the Radar overlay.
1
From a Radar screen or the Radar overlay, select MENU >
Other Vessels > AIS Display Setup.
2
Select an option:
• To indicate the distance from your location within which
AIS vessels appear, select AIS Dis. Range, and select a
distance.
• To show details about AIS-activated vessels, select
Details > Show.
18
Transmit).
(Enabling a Guard
Zone).
• To set the projected heading time for AIS-activated
vessels, select Projected Heading, and enter the time.
• To show the tracks of AIS vessels, select Trails, and
select the length of the track that appears.
VRM and EBL
The variable range marker (VRM) and the electronic bearing
line (EBL) measure the distance and bearing from your boat to
a target object. On the Radar screen, the VRM appears as a
circle that is centered on the present location of your boat, and
the EBL appears as a line that begins at the present location of
your boat and intersects the VRM. The point of intersection is
the target of the VRM and the EBL.
Showing the VRM and the EBL
The VRM and the EBL configured for one mode are applied to
all other radar modes.
From a Radar screen, select MENU > Show VRM/EBL.
Adjusting the VRM and the EBL
Before you can adjust the VRM and the EBL, you must show
them on the Radar screen
You can adjust the diameter of the VRM and the angle of the
EBL, which moves the intersection point of the VRM and the
EBL. The VRM and the EBL configured for one mode are
applied to all other radar modes.
1
From a Radar screen, select a new location for the
intersection point of the VRM and the EBL.
2
Select Drop VRM/EBL.
3
Select Stop Panning.
Measuring the Range and Bearing to a Target Object
Before you can adjust the VRM and the EBL, you must show
them on the Radar screen
1
From a Radar screen, select the target location.
2
Select Measure Distance.
The range and the bearing to the target location appear in
the upper-left corner of the screen.
Radar Overlay
When you connect your chartplotter to an optional Garmin
marine radar, you can use the Radar overlay to overlay radar
information on the Navigation chart or on the Fishing chart.
The Radar overlay superimposes radar information on the
Navigation chart or the Fishing chart. Data appears on the
Radar overlay based on the most recently used radar mode
(such as Harbor, Offshore, or Sentry), and all settings
configurations applied to the Radar overlay are also applied to
the last-used radar mode. For example, if you use Harbor mode
and then you switch to the Radar overlay, the Radar overlay
would show Harbor mode radar data. If you changed the gain
setting using the Radar overlay menu, the gain setting for
Harbor mode would change automatically.
Radar Overlay and Chart Data Alignment
When using the Radar overlay, the chartplotter aligns radar data
with chart data based on the boat heading, which is based by
default on data from a magnetic heading sensor connected
using a NMEA 0183 or NMEA 2000 network. If a heading
sensor is not available, the boat heading is based on GPS
tracking data.
GPS tracking data indicates the direction in which the boat is
moving, not the direction in which the boat is pointing. If the
boat is drifting backward or sideways due to a current or wind,
the Radar overlay may not perfectly align with the chart data.
This situation should be avoided by using boat-heading data
from an electronic compass.
(Showing the VRM and the
(Showing the VRM and the
EBL).
EBL).
Radar