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Continuity of storing data
The VDR should be provided with power to store data for 12 h on a first-in, first-out basis.
Recording is terminated only under the following circumstances:
a) During essential maintenance while the vessel is in port.
b) When the vessel is laid-up.
c) In case of emergency, when the backup HDD is removed.
Data Collecting Unit
The DCU mainly consists of Data Processor Unit and Power Control Panel. The DCU includes
two 12 V backup batteries with a lifetime of approximately four years. The DCU collects the data
from various sensors and radar and records them in the DRU and backup HDD.
Recording interval of data and audio is as follows:
- Radar video signal: every 15 seconds
- Bridge and VHF audio: real time
- IEC sentences: when received
- Analog and digital data: every second
Breaker switches (from left)
Battery Backup, DC, AC
Status Display
LEDs (from left)
SAVE (yellow):
When stopping the data
recording, this starts
blinking from OFF state,
then lights steadily.
If the HDD is disconnected,
this LED lights also.
NORMAL (Green):
On at normal operation.
ERROR (red):
Lights for error.
LEDs: Light (green) when respective power is applied.