A Bridge Navigational Watch Alarm System (hereafter 'BNWAS') is to monitor and detect if an officer of watch(hereafter ‘OOW’) keeps a sharp lookout on the bridge. The careless lookout of an OOW could lead to marine accidents. For this reason on June 5th, 2009, IMO decided that a ship is equipped with a BNWAS. However, an existing BNWAS gives the OOW a lot of inconvenience and stress in its operation. It requires that the OOW should press reset buttons to confirm their alert watch on the bridge at every three to twelve minute. Many OOWs have complained that at some circumstances they cannot focus on their bridge activities including watch-keeping due to a lots of resetting inputs of BNWAS. Accordingly, IMO has allowed the use of a motion sensor as a resetting device. The motion sensor detects the movements of human body on the bridge and subsequently sends reset signals directly to BNWAS automatically. As a result, OOWs can work uninterrupted. However, some of classification societies and flag authorities have a slightly different stance on the use of motion sensor as a resetting method for BNWAS. The reason is that the motion sensor may trigger false reset signals caused by the motion of objects on the bridge, especially a slight movement such as toss and turn of human body which can extend the period of careless watch. As a basic study to minimize the false reset signals, this paper proposes a simple configuration of BNWAS, which consists of only three motion sensors associated with ‘AND’ and ‘OR’ logic gates. Additionally, several considerations are also proposed for the implementation of motion sensors. This study found that the proposed configuration which consists of three motion sensors is better than an existing one by reducing false reset signals caused by a slight movement of human body in one’s sleep. The proposed configuration in this paper filters false reset signals and is simple to be implemented on existing vessels. In addition, it can be easily installed just by a basic electrical knowledge.

본 연구에서는 해군 장교들의 해기능력을 검증하는 자체 시스템인 PQS 제도를 국제해사기구의 국제협약인 STCW, 국내 해기 관련 지정교육기관 교육 프로그램, 해기사 면허 취득 자격요건 등과 상호 비교 분석하였다. 현 해군 PQS 제도는 안전항해 측면에서 STCW 협약에서 요구하는 최소한의 필요조건을 만족하는 수준으로 평가된다. STCW 협약을 기준으로 해군 PQS 제도의 발전방안을 제시하면 다음과 같다. 첫째, PQS 제도의 평가범위를 안전항해와 관련된 법규, 해사영어, 천문항해 분야까지 확대할 필요가 있다. 둘째, PQS 평가문항수를 확대하고 객관식, 단답식, 서술식 등 평가유형을 다양화할 필요가 있다. 셋째, 항해과 장교 출신별(사관학교, 학군장교, 학사장교)로 해기능력 관련 교육의 상이에 따른 문제를 해결하기 위해서, 상대적으로 해기 관련 교육기간이 짧은 학사 출신 장교들에 대해 PQS 합격기간을 연장해 주고 실습기간도 별도로 부여해 줄 필요가 있다.

전자해도시스템(ECDIS)에서 사용되는 공인 디지털해도인 전자해도는, 최근 2018년까지 국제해사인명안전협약(SOLAS) 선박에 대한 의무탑재가 결정됨에 따라 많은 선박에서 사용되고 있다. 또한, 전자해도는 국제수로기구(IHO)의 간행규정에 따라 각국 수로국이나 공인된 기관에서 간행되므로 공인된 해양지리정보로서 항해목적 이외에도 해양의 다양한 분야에서 사용되고 있다. 그러나, 기본적으로 전자해도는 공인된 ECDIS 장비에서 사용되도록 공급체계가 제시되어 있으며, 또한, IHO의 전자해도 보안표준인 S-63을 적용하여 제공되는 경우가 많으므로 비 항해용 목적의 전자해도 수요에는 효과적으로 대응하지 못하고 있다. 본 논문에서는 기존의 ECDIS에서 사용되는 항해목적의 수요와 비 항해용 수요를 통합적으로 대응할 수 있는 전자해도 통합공급서비스체계에 대한 방안을 제시하며, 제시된 방안을 검증할 수 있는 통합공급시스템의 구현결과를 제시한다.

Recently, due to the several factors such as the advent of very large vessels and high-speed vessels, and the increase of the maritime traffic density at sea, the obligation, responsibility and burden of marine officers on duty for the safety of navigation has been highly escalated. Under these situations, if the appropriate and correct navigational information is given to officers at real time by means of certain integrated information processing system, these obligation, burden and danger can be reduced. This paper deals with the study on the development of the Navigational Information Monitoring and Recording System that can give and record the integrated navigational information based on the personal computer system installed on board. To construct this system, the interface unit which changes different signal types of navigational equipments to NMEA 0183 signal format and the application software to show the visual navigational information were developed. In this study, the navigation system of T/S HANBADA in Korea Maritime University was used in order to construct the actual system that can be utilized in other ships, and also the performance test was carried out several times to examine the performance of the system developed. It was proved that all functions of the system as designed worked smoothly through the performance test. Also this system could be operated easily and conveniently by every user.

It is of great importance for any vessel under way, especially in rough sea, to be maneuvered safely with proper seakeeping performance. In this paper, the author aims to develope a navigational safety evaluation system in rough sea by analyzing ship's with the theory of wave spectrum using random process analysis and the theory of evaluating the seakeeping performance. The scope and the method of this study are as follows ; (1) Modelized typhoon mathematically to represent the sea condition in rough sea. (2) Estimated sea conditions by getting wave spectrum, supposing that the wave by typhoon is fully developed short crest irregular wave. (3) Defined evaluation factor of vessel's seakeeping performance and obtained response amplitude operators thereby. (4) Obtained the response spectrum of factors on seakeeping performance. (5) Defined and obtained evaluation index, dangerousness, relative and maximum dangerousness of factors on seakeeping performance. (6) Analyzed the calculated dangerousness of evaluation index and picked the vertical acceleration out of 7 factors as the presentative factor on seakeeping performance. (7) Carrid out the judgement of danger by obtaining dangerousness value according to steaming hour, course alteration and speed change. By synthesizing the above items, the authors suggests a computer model of navigational safety evaluation system and examined the validity of the model by computer simulation.

電波方向探知器나 레이다 等과 같은 電波航海計器를 갖추기 힘든 小型漁船을 위하여 마이크로波를 利用한 船位位測定方式을 開發하고