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Signal research for alternative Baltic Navigation System

100%

Dziewicki M. , Młotkowski J. , Stupak T.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2020

tom Vol. 14. no. 4

799--802

In the project R-Mode a navigation system for Baltic Sea is designed. In the range of these actions in summer of 2020 the signal for DGPS base station Rozewie were adopted and measurements on the sea were performer. This experiment is shown in the article.

IHO S-100 data model and relevant product specification

84%

Lee S. , Kim H.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2024

tom Vol. 18 No. 2

297--301

The International Hydrographic Organization (IHO) has established a new hydrographic information standard, the S-100 standard. This standard applies the ISO 19100 series to the legacy hydrographic exchange standard in order to overcome the limitations of existing hydrographic information expression. The first version of the S-100 standard was released in 2010, and the latest version, 5.0.0, was released in 2022. The International Maritime Organization (IMO) officially adopted the IHO's S-100 for hydrographic information exchange. The S-100 standard is the base standard, and each hydrographic information is developed as a document called the product specification. The product specification is being developed and led by various standardization organizations. The product specifications developed by each standardization organization are based on S-100, but they are defined in various ways according to the characteristics of information and expression methods. In this paper, the different product specifications of IHO's S-12x series and IALA's S-2xx series are analyzed in terms of features and classes from the data model point of view. The analysis of the feature, attribute, and feature relationship of each product specification was conducted by reviewing both the Data Classification and Encoding Guide (DCEG) and the entire document of the product specification. This study has identified areas of overlap in S-100 product specifications and has explored potential solutions to address these issues.

A study to determine the most effective daymark shape for a leading line

84%

Ahmad Fuad A. F. , Adlan D. A. A. , Kamis A. S. , Ahmad A. S.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2022

tom Vol. 16 No. 3

497--500

The use of daymark shapes for leading lines include its visual shape and symbol, to aid sailors who need to navigate safely through a marked narrow channel. The shapes which are currently used are rectangles, diamonds, and triangles. However, there is not much information on which shape is the most effective for navigational referencing. Therefore, the main objective of this research is to determine the most effective shape for a leading line daymark. The Kemaman Port was used as an area of interest to model the three-dimensional simulation. The size and height of the leading line daymark was calculated based on the dimensions of the navigational channel obtained from the Kemaman Port navigation chart. The simulation for different shapes of the leading mark in the same area was developed using a three-dimensional software. Experts were engaged to evaluate the effectiveness of each daymark shape across the maximum and minimum distances during the simulation run. Results showed that the diamond shape daymark was relatively better identified and used as reference, compared to other shapes in the same range due to its relatively larger surface area. Therefore, the study objective was achieved, and the results can be used to improve marine navigation safety.