User's Manual

Table Of Contents
ED 3100 G 110 / 02 (2011-10)
Operating Instructions
A-5 RADAR Sidebar - Permanent Area
A RADAR.fm / 10.11.11
A-47
NACOS Platinum
Re-centering of the EBL (and VRM if joined) can also be done by the context menu
in the application area. Right-click in the PPI and choose Center EBLx.
The current bearing is displayed in the Toolset group.
To switch off display of the EBL, clear the checkbox in the Toolset
group.
The EBL can also be set by means of the radar keyboard.
To switch on the EBL, press the button for a short time. Adjust the bearing by
means of the rotary knob. To switch off the EBL, press the button for about 2
seconds.
Latitude-Dependent Errors in the Display of the EBL
With the type of projection used for the longitude/latitude grid in the radar, the parallels of latitude
become more strongly curved with increasing latitude, while the meridians converge increasingly with
increasing distance from the equator (i.e. the direction of a meridian at the edge of the PPI is not 0° -
180° but might be 358° - 182° ); in other words, their directions no longer correspond to the degree
scale at the edge of the PPI.
In contrast to this, the EBL is always displayed as a straight line; its bearing displayed as an EBL value
has a deviation with its maximum at the most distant point from own ship.
The following table shows the maximum bearing deviation for various latitudes and range settings.
Table A / 9 Latitude-Dependent Errors of the EBL
Distance of EBL from
Own Ship
Geographical Latitude
20 ° 40 ° 60 ° 80 °
10 NM < 0.1 ° 0.1 ° 0.3 ° 0.9 °
20 NM 0.1 ° 0.3 ° 0.6 ° 1.9 °
40 NM 0.2 ° 0.5 ° 1.2 ° 3.8 °
60 NM 0.4 ° 0.8 ° 1.7 ° 5.7 °
80 NM 0.5 ° 1.1 ° 2.3 ° 7.5 °
EBL1
OFF
EBL2
OFF
Bearing