Simplified Voyage Data Recorder (S-VDR), as defined by the requirements of IMO Performance Standard MSC.163(78), is a lower cost simplified version VDR for small ships with only basic ship’s data recorded.
The differences between S-VDR and VDR based on the required data recorded are illustrated on the following table (X indicates mandatory data):
| Input | VDR | S-VDR |
| Date and Time | X | X |
| Ship’s Position | X | X |
| Speed | X | X |
| Heading | X | X |
| Bridge Audio | X | X |
| Communications Audio | X | X |
| Radar Data | X | X |
| AIS – (Radar alternative) | When no radar signal is available | |
| Acceleration and Hull Stresses (if fitted) | X | Only when they are available on the bridge via an IEC 61162 interface |
| Echo Sounder | X | |
| Engine Order and Response | X | |
| Hull Openings (Doors) Status | X | |
| Main Alarms (IMO Mandatory Bridge Alarms) | X | |
| Rudder Order and Response | X | |
| Watertight and Fire Doors Status | X | |
| Wind Speed and Direction | X |