Simrad ARGUS FMCW 3G, User Manual

Page: 37 / 150

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Basic operation | Argus Radar Operator Manual
Disabled AIS lost alert page 91
Disabled AIS danger auto-activation page 91
Presentation reset page 62
System status / System failure page 29
Own ship section
In this section the operator has a fast read-out of all the information concerning Own Ship
(See “System data area sections” on page 23).
System data area – Own Ship section
Gyro and speed
Indicates the heading data received from the connected Gyro compass in degrees. If the
communication with the gyro compass is interrupted or the Gyro compass is incorrectly con-
nected or the information receiving data from is wrong, the gyro value label will show “---.-” in
red color and a System Failure will appear, indicating a failure of the gyro.
When the IEC61162 sentence THS is the source of the heading information, the mode indica-
tor field is checked against invalid data or low integrity data. In this case, the heading data is
presented in red for invalid values and black on a yellow background for low integrity data.
Gyro preset
The function of this menu is to set the proper angle between the ship’s heading and North, in
case of incremental gyro such as Stepper or Synchro.
Operating with an incremental gyro, the value provided by the gyro compass is only the
incremental value (a fraction of an angle) and not the absolute value; therefore it is neces-
sary to provide a proper reference pre-setting of the heading value. In this way, changing the
heading, the incremental value will be added to the pre-set value. This value must be set at
the start-up, after a blackout and after the storage of any radar setting.
In case of a Gyro serial signal (NMEA) this setting is not required, because the value provided is
the absolute value (if entering 120°, the gyro will assume the heading is 120°). In this case the
Gyro preset button is disabled.
To pre-set the gyro value, press the Gyro preset
button and a numeric keypad will appear above
the system setup menu. The setting is provided
manually, entering the value by means of the
alphanumeric keyboard and pressing the Enter
button (green).
There could be several reasons why the value is
not accepted by the system. If the Gyro field has
a red background, the Gyro signal is in failure and
the failure is briefly described in the field. The
possible failures with incremental gyro are: