Northrop Grumman Sperry Marine VisionMaster FT, User Manual

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Radar/Chart Radar User Guide Basic Operation of Radar
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Sensor Data Display
The information shown in the sensor data display is transmitted via
navigation sensors. This information is available in both Standby and
Transmit modes.
Each sensor is identified by the following data types:
 HDG (Heading)
 STW (Speed Through Water)
 COG (Course Over Ground)
 SOG (Speed Over Ground)
For each data type, a sensor source must be selected to provide the
required data. The selected sensor source for each data type can be
viewed, or where necessary changed, from the Sensors menu.
The sensor data display is divided into three columns:
Caption
The captions are always the abbreviated data types listed above.
Readout
Shows the current heading direction (as indicated by the Heading Line),
course and speed (through water and over ground) as indicated by the
selected sensor.
A readout of true heading is always displayed, unless compass alignment
is being prompted, or a compass error
5
has occurred.
5
A compass error will cause the heading readout to change from green to red and a compass
alarm will be raised. If a stabilised picture presentation is in use, and the error is still present,
then after 1 minute, the picture will revert to Head-UP. For certain types of compass input, it
will be necessary to align the heading readout by manually entering the current heading after
the radar display is switched-on. The need for alignment is indicated by the heading readout
flashing green.