• Smart Media Journal
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• v.2 no.1
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• pp.42-47
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• 2013

The paper presents VDR system for efficiency of ocean navigation device and how to output and to save data using this system as well as compressed digital data and analog video output from the camera are utilized at the same time. The compressed digital data is used to store video for VDR device while analog video is used to display on screen in real-time so that VDR system saves the load on SD memory card without navigation terminal and output it with real-time video. Also, the control method using VDR system are proposed for saving and outputting data.

• Journal of Navigation and Port Research
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• v.34 no.5
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• pp.319-324
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• 2010

For the purpose of technological analysis in the marine accidents and their prevention, IMO have made it obligatory to load VDR which is similar to the black box in aircraft. However, in case of body sinkage, capsizing, stranding and plunging which are almost 10% of marine accidents, it is difficult to take out the necessary data from the VDR in order to analyze the cause of them. Therefore, this paper apply the navigation dangerousness evaluation technology to the VDR to improve its performance. And we suggest that the vertical acceleration which is one of the factors for evaluating seakeeping performance of a ship is to be added in the existing VDR record data recommended by IMO.

• The Journal of the Korea institute of electronic communication sciences
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• v.10 no.3
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• pp.341-347
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• 2015

This study aims to design a chief VDR(Voyage Data Recorder) system which is appropriate to small and medium sized vessels and also implement the data about marine communication devices, sensors, etc. to be stored or printed at the navigator when those data are connected to VDR through data communication between marine navigation and VDR which are based on serial communication or internet in order to prove efficiency of the marine navigator. Also, the design of VDR is intended to be small and light in order to expand to apply it to small and medium vessels, which enables to analyze causes of marine accidents precisely through its characteristic functions which are the same as those at "vehicle mounted black-box" (location of the car, image and voice storage) by which the same roles are played on land.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2014.10a
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• pp.21-22
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• 2014

VDR은 IMO의 협약에 따라 요구되는 모든 선박의 데이터를 기록하는 장비이다. 2002년 7월 1일 이후 건조되는여객선과 3,000톤 이상의 여객선을 제외한 모든 선박을 VDR를 탑재하여야 한다. 이것은 항공기의 블랙박스와 같이 사고조사를 가능하게 한다. 이 논문에서는 VDR을 이용한 선박의 거동 특성에 대하여 실선 M/S WS 선박을 대상으로 실시하기로 한다. 이 선박은 2014년 1월 여천에 있는 GS 칼텍스 터미널 부두와 충돌하여 상당량의 기름을 유출시킨 바 있다. 이 논문에서는 어느 쪽 타각을 더 많이 사용하였는지를 알기 위하기 위하여 타각면적을 도입하였다 그 외에 평균 선수방위, 평균속력, 평균 rpm 등을 사용하였다. 이 결과 이 선박은 우현타각을 많이 사용하는 것으로 나타났고 이것은 이 선박이 좌선회하는 경향이 있음을 확인할 수 있다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2007.06a
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• pp.219-222
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• 2007

본고에서는 최근에 IMO에서 시행될 VDR(Voyage Data Recorder)에 대해 분석하고 특히 통신설비와 결합된 부양형 S-VDR(Simplified -Voyage Data Recoder)에 대한 통신 기술적 측면에 대해서 기술하였다. 이 장비에 결합된 통신 기술은 기존 EPIRB(Emergency Position Indicating Radio Beacon) 기술을 S-VDR과 결합한 것으로 통신적인 측면에서 기술적인 변화는 없다. VDR의 경우에도 기능을 단순화하여 경제적인 항행장비인 S-VDR로 변화되었으나 기술적인 측면의 변화는 없다. 부양형 S-VDR은 통신 기능을 포함하고 있으므로 통신설비이며 기존익 조난 구조를 위한 EPIRB를 대신할 수 없다. 그러므로 본고에서는 부양형 S-VDR에 대한 국제 표준화기구(IMO, IEC, ITU, COSPAS-SARSAT 등)의 관련 자료를 분석하고 사용 범위 및 용도 등을 명확히 정리했으며 이 결과가 해상통신 관련 규정에 반영되도록 제안하였다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2010.04a
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• pp.413-414
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• 2010

For the purpose of technological analysis in the marine accidents and their prevention, IMO have made it obligatory to load VDR which is similar to the black box in aircraft. However, in case of body sinkage, capsizing, stranding and plunging which are almost 10% of marine accidents, it is difficult to take out the necessary data from the VDR in order to analyze the cause of them. Therefore, this paper apply the navigation dangerousness evaluation technology to the VDR to improve its performance. And we suggest that the vertical acceleration which is one of the factors for evaluating seakeeping performance of a ship is to be added in the existing VDR record data recommended by IMQ.

• Journal of Advanced Navigation Technology
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• v.11 no.1
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• pp.17-23
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• 2007

This paper, describes the VDR physical layer design in VDL Mode-2 in order to meet the requirements of International standards. VDR's frequency band is 117.975~137MHz, and CSMA(Carrier Sense Multiple Access), D8PSK(Differential Eight Phase Shift Keyed), 25KHz's channel bandwidth use. The analysis of the isolated channel from near channels, sensitivity of the receiver, dynamic range of the receiver, linear of the transmitter and energy of spurious for linear and non-linear simulation as a requirement condition of performance of VDR and teaches the course of design. The transmitting power level should be lower than 5dB from Po1dB point and the selected IF frequency is 45MHz to suppress the spurious signals. The receiver designed has 4.5dB of Noise figure, 27.52dB of Es/No, Mixer isolation up to 30dB, IIP3 power of LNA up to +10dBm to minimize the intermodulation.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.23 no.3
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• pp.515-530
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• 2013

The results of investigations into marine incidents have become an important basis in determining not only possible causes, but also the extent of negligence between the perpetrator and victim. However, marine incidents occur under special circumstances i.e. the marine environment, and this leads to difficulties in identifying causes due to problems in scene preservation, reenactment and acquisition of witnesses. Given the aforementioned characteristic of marine incidents, the International Convention for the Safety of Life at Sea (SOLAS) has adopted mandatory regulations on the carriage of Voyage Data Recorders (VDRs) and Automatic Identification Systems (AIS) for ships of a certain gross tonnage and upwards, so as to reflect recent developments in radio communication and marine technology. Adopted to provide an international standard for investigations and to promote cooperation, the Code of the International Standards and Recommended Practices for a Safety Investigation into a Marine Casualty or Marine Incident (Casualty Investigation Code) recommends member states to build capacity for analysis of VDR data. Against this backdrop, this paper presents methods for efficient investigations into the causes behind marine incidents based on data analysis of VDR, which serves as the black box of ships, as well as digital forensic techniques.

• Journal of Aerospace System Engineering
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• v.1 no.4
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• pp.13-21
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• 2007

As one of YHF digital data link technologies, VDL Mode 2 is designed to be an air-to-ground subnetwork of the Aeronautical Telecommunication Network (ATN) based on the Open System Interconnection (OSI) architecture. VDL Mode 2 can be used in ATS Applications especially for CPDLC and ADS. And it is also expected to replace ACARS (Aircraft Communications Addressing and Reporting System) which has broadly been used in AOC for over 20 years. This paper presents the design result of VDL Mode 2 system under AOA (ACARS Over AVLC) environment for the implementation of bit-oriented ATS applications. The system is composed of airborne and ground subsystem. Airborne subsystem consists of VDR, CMU and an aircraft test equipment with CPDLC/ADS client applications for operational test and ground system consists of Ground Station which includes ground VDR and ground communication controller, simple DSP (Datalink Service Processor) and a ground test equipment with CPDLC/ADS server applications.

• Proceedings of the IEEK Conference
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• 2009.05a
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• pp.178-181
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• 2009

본 논문에서는 선박용 항해정보기록장치의 개발을 위해 필요한 요구사항을 만족할 수 있는 기능을 갖추고, 향후 여러 가지 부가 기능이 쉽게 추갇힐 수 있는 구조를 갖도록 WnCE O/S 기반 ARM embedded 시스템용 플랫폼을 설계하였고, 주요 기능 중 영상 정보 압축 및 저장 회로를 구현하여 기능을 검증하였다.