간행물
Journal of Korean Navigation and Port Reserch KCI 등재 한국항해항만학회지
- 발행기관 한국항해항만학회
- 자료유형 학술지
- 간기 격월간
- ISSN 1598-5725 (Print)2093-8470 (Online)
- 수록기간 1977 ~ 2020
- 주제분류 농수해양 > 해상운송학 농수해양 분류의 다른 간행물
- 십진분류KDC 559DDC 629
권호리스트/논문검색
Vol.12 No.3 (1988년 12월) 4건
1.
1988.12
서비스 종료(열람 제한)
A Satellite -aided search and rescue system is expected for its many advantage of global coverage, instantaneousness and low cost. In this paper, a calculation method is proposed , by which a position of distress can be determined with doppler frequency received through an orbital satellite. First, an algorithm and program is developed for calculating the position of distress with the received doppler frequency of EPIRB(Emergency Position Indicating Radio Beacon) with the least square method. Then, position error caused by the drift of the transmitting frequency is evaluated. The evaluation is made by the simulation using NNSS satellite orbital elements and varying position of EPIRB, numbers of Doppler data and magnitudes of various errors. As the result, the availability of this program for a satellite-aided search and rescue system is confirmed and the bounds of expected positioning accuracy is clarified.
2.
1988.12
서비스 종료(열람 제한)
This paper deals with the method of determining the drag of hull surface which has any quality of roughness. The method consists mainly of the theoretical point of view, then the theory enables the drag coefficient to be calculated at full scale. The hydrodynamical roughness function of hull surface △U+, affected by the hull roughness are considered as to two cases, smooth surface and rough surface case separately. The inadequacy of a single parameter to define hull roughness is discussed and thus an as additional texture parameter is proposed.
3.
1988.12
서비스 종료(열람 제한)
The increase in seaborne cargoes has made our coastal traffic congested, and future coastal traffic is also expected to increase considerably as result of our economic development and high dependence on foreign trade. This increased traffic may be a cause of serious sea pollution as well as greater number of sea accidents. In view of this problem the introduction of VTMS along on our coast is required, following careful study of a large number of foreign systems. This paper analyzes the actual condition of 132 VTMSs in the world from the view point of management method authority of VTMS, coverage and characteristics of system. And this results provide helpful information for the development of VTMS in the future and for the implementation of VTMS in our coastal waterway.
