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Overview
There is no principle difference between a voyage data recorder (VDR) and a simplified voyage data recorder (SVDR). The difference is the amount of information required to be recorded. The VDR requires more data to be recorded than the SVDR.

Input Signal Requirements for VDR and SVDR
Interface
VDR
SVDR
Date and Time
Ship’s Position
Speed
Heading
Bridge Audio
Communication Audio
Radar Data – Post Display Selection
Only if standard interfaces available
AIS
If no radar is connected
Echo Sounder
Only if these data are available in a
serial format according to IEC 61162
Main Alarms
Rudder Order and Response
Engine Order and Response
Hull Openings (doors) Status
Watertight and Fire Door Status
Acceleration and Hull Stresses
Wind Speed and Direction
 

 
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