C-Nav 1000 R4, Installation Manual, Page: 8 / 82

INTRODUCTION Page 2
1.2 System Overview
Figure 1-1 shows an overview of the R4 Navigation System. The R4
Navigation System is available in two configurations: GPS and DGPS. Both
configurations feature an R4 Display. The GPS configuration also features
an R4 GPS Navigation Sensor and an MGA-2 GPS antenna, while the
DGPS configuration features an R4 DGPS Navigation Sensor and an MGL-
4 combined GPS/Beacon antenna.
The R4 Display provides a graphical interface to the system. Via the display
it is possible to create, edit and modify routes and waypoints, navigate
following a route, plot the current route as well as perform other
navigational functions.
The R4 GPS Navigation Sensor features a high-precision GPS receiver,
capable of receiving WAAS, EGNOS and MSAS differential corrections.
The R4 DGPS Navigation Sensor has all the features of the GPS Sensor, as
well as a dual channel beacon receiver for reception of IALA beacon DGPS
corrections. Both the GPS and the DGPS Navigation Sensor perform
continuous RAIM calculations according to the IEC 61108-1 (2
nd
edition)
standard (see Ref. [5]).
The Navigation Sensor is connected to the antenna, either an MGA-2 GPS
antenna or an MGL-4 combined GPS/Beacon antenna. The MGL-4 antenna
is capable of receiving both radio beacon and satellite signals.
Together the R4 Display and R4 Navigation Sensor provide three
configurable serial user ports, of which two are bidirectional and one used
for output only. There is also one binary Speed Log output port, one Alarm
output port and one Alarm Acknowledge input port.
For more details, see sections further on in this Installation Manual.
Figure 1-1: R4 Navigation System overview