15. NAVIGATION TOOLS
15-3
15.2.1
How to show the radar overlay
Radar echoes can be output to the ECDIS and shown on its display. Like details on
S57 charts, the radar overlay can be displayed or removed from the chart display. The
transparency of the echo display can be set from the [Echo] page in the [Overlay/NAV
Tools] box. To activate and setup the radar overlay, do the following:
1. With the system in [RADAR] mode, begin radar transmission.
Note:
While the system is preparing for radar transmission, the radar overlay is
not shown on the chart display.
2. Switch the system to [CHART for RADAR]
mode, then select the [Echo] page from the
[Overlay/NAV Tools] box.
3. Click the [ON/OFF] button at [Display] to show
[ON] (radar overlay ON) to activate the overlay.
"Status: OK" appears under [Antenna] if the ra-
dar signal is being received. "Status: No Data"
is displayed if there is no radar signal.
Note:
The radar display, TT symbols and AIS
symbols can also be hidden by clicking
[CLEAR RADAR] on the Status bar.
4. [Echo Level] adjusts the sensitivity of the radar picture. To adjust, put the cursor
on the slider bar and roll the scrollwheel.
5. [Density] controls the "see through" behavior of the radar overlay. [100%] overlays
the radar echo on the chart without modification. "75%" displays radar echoes
faintly, and "25%" displays radar echoes somewhat faintly. It is recommended to
use 25% or 50% when navigating narrow channels, so as not to conceal land-
masses.
6. Click the [Antenna] drop-down list to select the radar that is to feed radar echoes.
15.2.2
Error Between Radar Echo Image and Chart
There are several reasons why the radar echo image and chart display do not match
exactly. The mismatch is a combination of several reasons and removing one reason
doesn't solve the mismatch perfectly. There is a fundamental difference between the
radar echo image and corresponding chart feature. The radar echo is a reflection from
the real life target and the actual position of the real life target is the front edge of the
radar echo. Therefore, the radar echo should start from the chart feature and exist as
far as the radar pulse length goes.
How to compensate for bearing error
Bearing error occurs in the following instances:
• Gyro error
• Inaccurate chart
• Improper installation parameters (radar overlay bearing offset)
OK
Summary of Contents for FCR-2119-BB
Page 66: ...1 OPERATIONAL OVERVIEW 1 40 This page is intentionally left blank ...
Page 134: ...2 RADAR CHART RADAR OPERATION 2 68 This page is intentionally left blank ...
Page 182: ...4 AIS OPERATION 4 22 This page is intentionally left blank ...
Page 198: ...5 RADAR MAP AND TRACK 5 16 This page is intentionally left blank ...
Page 290: ...9 VECTOR S57 CHARTS 9 12 This page is intentionally left blank ...
Page 296: ...10 C MAP CHARTS 10 6 This page is intentionally left blank ...
Page 392: ...16 NAVIGATION SENSORS 16 16 This page is intentionally left blank ...
Page 398: ...17 AIS SAFETY NAVTEX MESSAGES 17 6 This page is intentionally left blank ...
Page 466: ...24 CONNING DISPLAYS 24 4 Example 2 General navigation Example 3 General navigation ...
Page 467: ...24 CONNING DISPLAYS 24 5 Example 4 General navigation Example 5 All waters navigation Silence ...
Page 534: ...FURUNO FCR 21x9 BB FCR 28x9 SERIES SP 6 E3607S01D M This page is intentionally left blank ...
Page 541: ......