{"id":2014,"date":"2025-05-18T03:45:45","date_gmt":"2025-05-17T20:45:45","guid":{"rendered":"https:\/\/new.myhr.co.th\/?p=2014"},"modified":"2025-06-25T10:02:19","modified_gmt":"2025-06-25T03:02:19","slug":"ais-2","status":"publish","type":"post","link":"https:\/\/myhrstg.triple-t.co\/?p=2014&lang=en","title":{"rendered":"\u0e23\u0e30\u0e1a\u0e1a\u0e15\u0e23\u0e27\u0e08\u0e2a\u0e2d\u0e1a\u0e41\u0e25\u0e30\u0e1a\u0e31\u0e19\u0e17\u0e36\u0e01\u0e40\u0e2a\u0e49\u0e19\u0e17\u0e32\u0e07\u0e40\u0e14\u0e34\u0e19\u0e40\u0e23\u0e37\u0e2d\u0e1c\u0e48\u0e32\u0e19\u0e23\u0e30\u0e1a\u0e1a AIS"},"content":{"rendered":"\t\t
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Vessel Inspecting and Recording via AIS System<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\u00a0 \u00a0 \u00a0 \u00a0The automatic identification system (AIS) or called Universal Automatic Identification System (USIS) is an automatic tracking system that allows maritime authorities to track and monitor vessel movements and is widely used by vessel traffic services both inland and international routes. The plan for using AIS requires the vessels over 300GT on international voyages and the vessels over 500GT on domestic voyages to install AIS device under IMO (International Maritime Organization) regulation. The signal from a marine modified from VHF will be tuned to AIS frequencies automatically and converted into a digital format that the computer can read while transmitting information and the location about the vessel itself to other AIS receivers fixed on the vessels or from shore base station nearby. The main purpose of AIS is to help identify vessel between itself and other ones; between itself and base stations located along coast lines, exchange and provide additional information, strengthen more safety awareness for the vessel voyages, and enhance the effectiveness of inspection on Vessel Traffic Control System (VTS).\u0e21<\/p>

\u00a0 \u00a0 \u00a0 \u00a0AIS device operates in the VHF maritime band, works as a shipboard broadcast system and is capable of communicating ship to ship as well as ship to base stations. The signals are time multiplexed using a technology called self-organized time-division multiple access (SOTDMA). The information provided by AIS device are position (latitude\/longitude), marine compass, length, width, type of ship\/cargo, ship\u2019s draught, on board dangerous goods information, etc. AIS functions primarily by acquiring Global Positioning System (GPS) coordinate to transmit data of geographic location (Lat\/Long) including of ship information to AIS base station nearby or to other ships. The capacity for sending data can be 1,000 times per minute and is automically updated. Data will be displayed on Electronic Chart Systems (ECS) or an Electronic Chart Display and Information System (ECDIS) which is a geographic information system used for nautical navigation. The displayed signals on ECS provide data sending to all vessels which sail within a range of VHF to capture the location and information of the other vessels fitted with AIS tranceivers.
(Source from http:\/\/www.port.co.th\/cs\/internet\/internetsystem_AIS.html) Transmission of data both sending and receiving in AIS system will be listed below:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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