• Electronics and Telecommunications Trends
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• v.25 no.4
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• pp.142-153
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• 2010

2010년 4월을 뜨겁게 달군 천암함 사태 때 사고 수색을 위해 생계인 조업도 포기하고 달려온 '98 금양호'가 침몰하였지만 금양호에 탑재된 조난 위치 자동발신장치는 1세대 탐색구조 단말기로 GPS 수선이 되지 않는 신호 장치였다고 한다. 만일 GPS 수신기가 탑재된 탐색구조 단말기가 설치되어 있었다면 상황은 달라졌을 것이다. 이와 같이 국가기반 재난뿐만 아니라 사회적 재난에 대한 대책마련이 중요시 되고 있다. 이에 u-방재 City 모델, u-Safe Korea 등 안전 및 방재에 관한 다양한 가이드 라인이 마련되고 있다. 본 고에서는 u-방재 서비의 개념 및 현황, u- 방재 서비스와 기술 동향에 대하여 기술하고자한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2011.06a
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• pp.382-384
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• 2011

해양구조물에서 헬리콥터는 주로 인력을 수송하지만 비상상황 발생 시 탈출수단 또는 수색 구조수단으로 이용되고 있으며, 자원을 찾아 깊고 먼 바다로 이동하는 해양구조물의 인력을 수송하기에 헬리콥터는 가장 빠르고 안전한 수단이지만 해상으로 추락과 같은 사고는 발생할 수 있다. 헬리콥터의 수중 추락 시 생존율을 높이기 위하여 헬리콥터 자체의 안전설비와 운용방식을 발전시키고 탑승자들에게 사전 브리핑을 실시하고 수중탈출 훈련을 실시하였다. 본 논문에서는 헬리콥터의 해상 추락 사고를 분석하고 탑승자의 생존율을 높이기 위한 헬리콥터의 안전설비 및 운용방식과 수중 추락 시 탑승자의 탈출요령에 대한 훈련에 대하여 소개한다.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.17 no.2
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• pp.83-91
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• 1984

The formation and structure of tidal front in the eastern part of the Yellow Sea were studied based on the oceanographic data compiled during the periods of $1982{\sim}1983$ and $1966{\sim}1970$. Well-defined fronts occurring in the Yellow Sea in summer mark the boundary between the stratified and vertically mixed regimes. The occurrence of vertically mixed regimes may be interpreted in terms of available turbulent kinematic energy of tidal currents. The tidal frontal regions were determined by horizontal gradients of temperature, salinity and dissolved oxygen, and were verified by water colour and transparency. In summer the tidal fronts were found at depths of $15{\sim}25m$ at about 20 miles from the shore. Potential energy of vortical stratification in the tidal frontal region was 10 $Joule/m^3$. The stratification parameter in the frontal region computed from the numerical tidal model was $S_p=1.0.$ Tidal front is formed in regions with $S_p=1-1.5,$ if surface heat flux are constant. Waters in the stratified region have the layer structures of wind-mixed surface layer, thermocline and tidal-mixed bottom layer. In the vertically mixed region, however, sea water is nearly homogeneous. in winter no distinctive tidal front was seen.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.4
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• pp.321-330
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• 2021

By reviewing domestic and international papers, this study examines various fields in which drones are used, and based on the results, fields are suggested in which drones can be used for the work of firefighters. Overall, the research results show that drones are most commonly used for search (51%), disaster and fire monitoring (35%), and delivery (14%). Specifically, in the search field, using a drone is more efficient in terms of manpower, equipment, time, and cost than using people, which is the current practice. Secondly, in disaster and fire monitoring, drones can analyze and identify disasters and fire sites in real time. Therefore, it was confirmed that the use of drones is helpful in securing the safety of firefighters and identifying a disaster site. Third, research in logistics shows that drones can secure the so-called golden time in emergency situations by delivering rescue and relief supplies, emergency medicine, and blood in short order. In a rapidly changing disaster environment, and considering aging in firefighters, this study is meaningful in that it promotes drone utilization in the firefighting field by investigating basic data on drone utilization plans.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2002.11a
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• pp.27-32
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• 2002

Cultural property Preservation Bureau of Korea excavated the massive shipwreck and her cargo from 1976 to 1984 sunken under Jeungdo Island, Sinan County located int eh southwest area of the Korean peninsula. It was the first systematic underwater excavation in Korea, and one of the richest underwater discovery int eh world. According to the reference materials, more treasure shipwrecks are assumed to be sunk under seaside of Korean peninsula. Such as, Donskoy near Ulleung Island, Kow Shing near Ul Island, and yamashita treasure ship off Korean peninsula, etc. The excavations of these treasure ship are likely to raise ownership dispute between private finders and government authority, and between ship owner and excavater due to lack of knowledge and awareness of related laws and regulation. Therefore, this study aims to examine existing legal regimes related to the excavated treasureship. And also it tries to suggest a new proactive measure to prevent the most likely ownership disputes between interested parties.

• Journal of Navigation and Port Research
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• v.26 no.5
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• pp.511-516
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• 2002

Cultural Property Preservation Bureau of Korea excavated the massive shipwreck and her cargo from 1976 to 1984 sunken under Jeungdo Island, Sinan County located in the southwest area of the Korean peninsula. It was the first systematic underwater excavation in Korea, and one of the richest underwater discovery in the world. According to the reference materials, more treasure shipwrecks are assumed to be sunk under seaside of Korean peninsula. Such as, Donskoy near Ulleung Island, Kow Shing near Ul Island, and Yamashita treasure ship off Korean peninsula, etc. The excavations of these treasure ship are likely to raise ownership dispute between private finders and government authority, and between ship owner and excavater due to lack of knowledge and awareness of related laws and regulations. Therefore, this study aims to examine existing legal regimes related to the excavated treasureship. And also it tries to suggest a new proactive measure to prevent the most likely ownership disputes between interested parties.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2006.06b
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• pp.241-246
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• 2006

This paper describes two kinds of personal hand-held electronic devices to support marine leisure safety. The one is Radar response-type safety device triggering by the pulse signal from a commercial 9GHz-band Radar to provide quick search and rescue with combined civilian-government-military fleets. The other one is M-RFID (Marine Radio Frequency IDentification) based safety electronic device using 900MHz Tx/Rx with spread spectrum frequency hopping and GPS. Through the field tests at sea using Korea Coast Guard's warship the operating performances are verified. Further plan for practical use of each device was also discussed.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2015.07a
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• pp.259-261
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• 2015

The model for ship maneuvering simulation is to enhance the competence of officer's ship maneuvering skills such as navigation equipment operation, collision avoidances, countermeasure an emergency situation so on. Despite using such ship maneuvering model, critical maritime accidents are occurred periodically in the world. To find adequate simulation model to evaluate competence abilities of deck officer who have maneuvering skills with some competence levels, we search the standard ship maneuvering method representing on the part 3 Person Overboard(POB) to onboard emergences of IAMSAR manual. Moreover we monitor the officer's human factors appearing during education and training and consider the use of human factors as fundamental data.

• Journal of Korean Port Research
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• v.14 no.3
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• pp.353-360
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• 2000

In this study a drift prediction model based on fluid dynamics theory is introduced. The essential effects of environmental loads and target characteristics are taken into account from a fluid dynamics point of view. The governing equations of motion are derived from Netwon's law of dynamics. In the mathematical formulation only three degrees of freedom(surge, sway, yaw) of the drifting object are assumed and the environmental loads considered are the forces and moments by wind and current. A computer algorithm for this model is implemented to obtain the numerical result in the time domain. The preliminary tests for model verification are conducted and the results are compared with the field experiment data as well as leeway formula suggested from the field test data.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.14 no.1
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• pp.70-74
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• 2006

Cospas-Sarsat, an international satellite system for search and rescue, started operating in early 1980's and has been credited with saving thousands of lives since then. Hundreds of thousands of aviators, mariners and land users worldwide are equipped with Cospas-Sarsat distress beacons, which could help save their lives in emergency situations anywhere in the world. This paper outlines the evolution of the system and describes how satellites are constantly circling the globe monitoring for rescue signals, while tracking stations on six continents receive the satellite signals, compute the locations of the distress events and forward the calls for help to the appropriate rescue authorities. Therefore, this paper points out the importance of developing of technologies of Hybrid Aviation Wireless SAR Equipment and also proposes to make it localized.