User Manual
Reference number: 4111A-RADAR4600-GBD-R1.1
Date: 27 February 2018
Page 56 of 149
3.4.17
Different solutions with reference target
A Reference Target may be used for two different purposes:
only for course and speed over ground
or for course and speed over ground and for position calculation of OS.
Additional it is selectable to get an automatic switch over to GPS calculation as soon as
missed GPS-calculation is available again.
As an example, in case of very low speed of own ship or when own ship is anchoring, a to and from jumping of
speed and course data and vector may be noted, due to HDOP by interference of GPS signals. By use of
reference target, a steady and correct indication will be achieved.
Position indication without reference target and with missing GPS-data
Missing GPS-Position (red indicated as alarm)
Speed data (through water) received from OS-log.
Reference data not defined.
Reference Target only used for COG/SOG calculation
To use Reference Target only for COG/SOG-calculation, mark the menu-circle 'GPS'.
Position not available due to missing GPS-data.
COG and SOG calculated by Ref.-Target.
Position-data calculated by GPS-Data.
Ref.-Target only used for COG/SOG
COG and SOG calculated by Ref.-Target