The Simplified Voyage Data Recorder (S –VDR) is an intelligent device, designed based on the SOLAS amendment V/20.2, for recording and saving the voyage information and fully accordance with the IEC61996 International Standard.

After more than 20 years' development, Advantech, as the constitutor and participant of the industrial computer standards, has developed as the leading brand in the international industrial computer field, become the third large engineering control enterprise and performed extraordinarily as DELL, HP and Lenovo in the civil computer field in its own engineering control field. It is more and more strictly required for the reliability of the computer in industrial and military field. The Advantech, paying attention on the developing trend of the global automation as well as the customer's demands, is trying to innovate the advanced automation technology and develop its product lines to offer excellent products and services to customers and own its worldwide reputation. Associating with the Advantech, SEALANTERN has developed the global first S-VDR product which is integrated with the audio grabber, radar grabber and 14 RS422 isolated serial ports on one board to realize the technological break for high integration, high reliability and high price-cost ratio to lead the world trend again.

SLT-18C S-VDR System Configuration & Functions

System Configuration:

Recording Control Unit
The host computer is applied the fanless embedded CPU from Advantech, Taiwan, data acquisition modules with internationally recognized digital format (IEC 61162 or NMEA 0183), audio process module, video data processing module, Ethernet management module and power supply management module

● Alarm Unit includes:
Communication process, LCD, buzzer, audio and visual alarm confirmation, which are fully accordance with the IEC performance standard for alarm and indicator

● Protective Data Capsule (PDC)
The PDC can update the data acquired from the recording control unit continuously and save the last 12 hours data automatically as well as expand its memory to 24h, 48h.

● Microphone
Adapt the omni direction FET Electret type; the microphones are connected to the S-VDR recording control unit through the preamplifier in a balanced transmitting way. The S-VDR software can send out the testing signal as well.

● Power Supply Unit
Adapt the power isolated transformer and UPS power supply and supply to the recording control unit which is satisfied the requirement of recording separately the sounds in the bridge at least 2 hours.

● Gyro Compass & Speed Log Interface (Optional)
The analog signals of the gyro compass or the pulse signals of the speed log can be converted into the standard IEC61162 data format.

● Replay Device (Optional)
Re-play the data saved in the final recording medium

System Functions:

Voyage Data Collection: collect the voyage status and data, record these data into the final recording medium in the protective data capsule via 14 isolated RS422 COMs.


S. N.


Source Signal


S-VDR Requirement


Date & Time











Speed Log





Gyro Compass

IEC61162-1and–2 (HDT)



Bridge Audio




VHF Communication Audio

VHF Radio



Radar Audio


Replaced by AIS in case of non-COTS interface


AIS Data


IEC61162-2 (PAS101)

Non-COTS radar replacement


Audio Data Collection: the audio recording of every position in and outer bridge can be realized by 1-9 microphones. Meanwhile, record the audio signals in the devices such as 1-3 VHF, commanding telephone. The responding range of the audio frequency is 150Hz – 6000Hz.

Image Data Collection: optional with radar interface, collect the unicolor and multicolor radar images and record. Resolution: 640×350 – 1280×1024, refresh rate: 60Hz – 85Hz, collecting time: 15s

Data Storage: all collected data can be saved in both final recording medium and backup recording medium, which both should be provided with certain self-protection to prevent any delete or tamper on the recorded data.

Self-inspection: when the system starts running, the self-inspection starts up automatically and sends out a status indication showing if the system runs correctly. System will alarm for any abnormality.

Replay: replay the data stored in the final recording medium by the replay device. The data stored in the final recording medium and the backup recording medium can be downloaded via the internet COM and replayed by the replay device.

System Characteristics of the SLT-18C S-VDR

● Associated with the world-wide famous supplier Advantech, Taiwan, with its fanless embedded CPU with long-life reliable operation under extreme sea condition
● Main CPU board with 14 isolated COMS, bridge audio and radar image grabber built in
● Smaller and lighter units with the low cost but equipped with the functions of VDR
● Optional gyro compass and speed log interface
● Microphone units: built-in testing generator, which sends out testing signals triggered by the host computer to detect if every microphone is running correctly.
● Stable and reliable performance: MTBF≥30,000hours, MTTR≤30minutes

Performance of the Protective Data Capsule (PDC)

The PDC is fully accordance with environmental test as the IEC60945 requires and the survival capability test as the IEC61996 requires. The protective capsule can ensure the data stored in the final recording medium being recovered without loss after the following circumstances:

● shock: 50g semi sine wave lasting 11ms
● Penetration: 250kg object with 100mm diameter cusp falling from 3m height
● Fire: 260
fire lasting 10h as well as 1100 lasting 1h
● Deep-sea pressure and immersion: bearable for 60MPa sea pressure which equals to 6000m depth

Alarm Panel

The status and alarm panel is built on front panel of the recording control unit to alarm the following failure:
● power supply failure
● communication failure
● video input failure
● audio input failure
● serial port data input failure
The alarm panel can be applied the remote installation customized

Dimensions of the S-VDR

Playback Software

As the platform of the windows, the playback software, in which the playback device is connected with the Ethernet interface of the recording control unit via the standard cable and downloads the data stored in the recording control unit or backup memory PDC, can display information and running status as well as repeat the voice of VHF and officer.

System Structure of the SLT-18C S-VDR