23. COMMON REFERENCE SYSTEM
23-2
z Gyro data:
• Serial format gyro data is fed directly from a gyrocompass, thus adjustment of
the heading indication on the chart radar is not necessary.
• If synchro or stepper gyro data is fed to the chart radar, the heading indication
on the chart radar must be adjusted to match that of the gyro. For the adjustment
procedure, see section 1.17.
z Speed data:
• Speed may be input from SDME or GPS.
• SDME may be single-axis water speed or dual-axis ground speed.
• GPS may be used to input COG/SOG.
• Ground speed may also be taken from TT reference target.
• Speed is entered from the [Setting] menu. For details, see section 1.16.
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