A STUDY ON DEVELOPMENT OF APPLICATION SPECIFIC MESSAGES (ASM) OF AUTOMATIC IDENTIFICATION SYSTEM (AIS) IN WARNING THE RISK OF VESSEL COLLISION

Abstract

The automatical identification system (AIS) is order to exchange information about static, dynamic and voyage related ship’s data with other ships and shore stations for maritime safety. Messages of the AIS system are mainly for the purpose of providing and exchanging these information, with only a few binary messages for broadcast or addressing, called special application messages (ASM). The structure of ASM messages is separate from conventional AIS messages. These messages are mainly used for environmental, meteorological, and hydrological information, while research on collision avoidance warnings are limited. Therefore, this article focuses on building the structure and algorithm to create ASM messages in warning the risk of vessel collision, carries out testing to warn the risk of vessel collision on ASM messages. The results showed that the developed ASM messages could warning of collision risks as desired, contributing to the purpose of maritime safety.