[논문]동해에서 지구 물리 이종방법간의 결합시스템을 활용한 침선 수색의 효용성 연구

유이선; 장남도; 정섬규; 이승훈; 이철구; 김선효; 조진형

doi:10.4217/opr.2022024

동해에서 지구 물리 이종방법간의 결합시스템을 활용한 침선 수색의 효용성 연구
Efficient Searching for Shipwreck Using an Integrated Geophysical Survey Techniques in the East Sea of Korea 원문보기

Ocean and polar research, v.44 no.4, 2022년, pp.355 - 364

유이선 (한국해양과학기술원 해양영토연구본부 해양방위.안전연구센터) , 장남도 (한국해양과학기술원 해양영토연구본부 해양방위.안전연구센터) , 정섬규 (한국해양과학기술원 해양영토연구본부 해양방위.안전연구센터) , 이승훈 (한국해양과학기술원 해양영토연구본부 해양방위.안전연구센터) , 이철구 (한국해양과학기술원 해양영토연구본부 해양방위.안전연구센터) , 김선효 (한국해양과학기술원 해양영토연구본부 해양방위.안전연구센터) , 조진형 (한국해양과학기술원 해양영토연구본부 해양방위.안전연구센터)

Abstract ▼ AI-Helper

When the 60-ton-class patrol boat '72' of the Korea Coast Guard (KCG) was on duty and she accidentally collided with another patrol boat ('207', 200-ton-class) and sank. A month-long search found a small amount of lost items, but neither the crew nor the ship was found. For the first time in 39 years since the accident, the Korea Institute of Ocean Science and Technology (KIOST) searched the boat 72 using the latest integrated geophysical techniques. A number of sonar images presumed to be of a sunken ship was acquired using a combined system of side scan sonar and marine magnetometer, operated at an altitude of approximately 30 m from the seabed. At the same time, a strong magnetic anomaly (100 nT) was detected in one place, indicating the presence of an iron ship. A video survey using a remotely operated underwater vehicle (ROV) confirmed the presence of a shielding part of a personal firearm at the stern of the sunken vessel. Based on these comprehensive data, the sunken vessel discovered in this exploration was assumed to be '72'. This result is meaningful in terms of future ocean exploration and underwater archaeology, as the integrated system of various geophysical methods is an efficient means of identifying objects present in the water.

주제어

표/그림 (11)

그림 Fig. 1. General arrangement of No. 72 ship ( Length, width, and weight of No. 72 s hip is 24 m, 5.5 m , and 60 tons respectively. Unlike general ships, personal firearms are installed in the bow and stern)
그림 Fig. 2. Schematic diagram and photograph of integrated SSS-Mag system (Integrated a side scan sonar and a magnetometer system has the advantage of obtaining both acoustic image and magnetic anomaly of undersea objects at the same time)
그림 Fig. 3. Vertical magnetic anomalies of a spherical object (Modeling the magnetic anomaly of the object with the same parameters as No. 72 ship indicates that it can be detected at a distance of 30 m, but rarely at a distance of 100 m)
그림 Fig. 4. Survey area and candidate targets (Blue square represents survey area. Black star indicates the accident point and black triangle represents candidate targets)
표 Table 1. Acoustic images of candidate targets (It is difficult for the ship to identify due to the low resolution of the acoustic image performed in advance by the Korea Coast Guard)
그림 Fig. 5. Bathymetric map of the survey area (The water depth of the survey area is about 80-120 m. A length and width similar to a ship were found in two places)
그림 Fig. 6. Cross-section of target 01 and 02 (The lengths of the two candidates are observed to be 20-25 m, making it difficult to determine which is ship NO. 72)
그림 Fig. 7. Mosaic image of the survey area and acoustical image of target 01 and 02 (The acoustic images (400 kHz) of the candidate show a similar appearance to the ship)
그림 Fig. 8. Magnetic anomaly map of the survey area (Showing strong magnetic anomaly, the candidate 02 is expected to have a high possibility of ship)
그림 Fig. 9. The comparison of (a) general arrangement of ship No.72, and (b) acoustical Image (a: G.A of ship No.72, b: acoustical image of target 02, c: fishing nets caught in a wreck)
그림 Fig. 10. The comparison of ROV optical images of target 02 (a, b) and general arrangement of ship No.72 (c) (a: optical Image of bow No.72, b: a cannon holder at the stern, c: G.A of ship No.72)

참고문헌 (10)

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