![]() ![]() Once formatted, the ASMs are sent to the AIS base station or AIS AtoN unit for transmission. As part of the queuing process, the AIS Very High Frequency (VHF) Data Link (VDL) must be monitored and feedback provided to the queuing process to adjust message output. Once formatted, messages are prioritized, geographically identified, and queued for transmission. This information is then formatted into ASMs based upon accepted standards. ![]() In general, ASMs are either created by a person (such as Vessel Traffic Service (VTS) operators, lock operators, or Sector Command Center (SCCs) watchstanders), or retrieved from an information data source (such as the National Oceanographic and Atmospheric Administration’s (NOAA) Physical Oceanographic Real Time System (PORTS) or United States Army Corps of Engineers (USACE) lock operations databases). As part of the AIS Transmit Project, several new ASMs have been defined and prototype methods have been developed for message creation, routing, queuing, transmission and monitoring. ![]() In order to transmit the information, it must be formatted into standard messages, called Application-Specific Messages (ASM). To implement these capabilities, the United States Coast Guard (USCG) Research and Development Center (RDC) has been working on an AIS Transmit Project since 2007 to research what additional information is required by AIS users, to recommend how the information should be transmitted, and to test transmission of this information at test bed sites. “e-Navigation is the harmonised collection, integration, exchange, presentation and analysis of maritime information onboard and ashore by electronic means to enhance berth to berth navigation and related services, for safety and security at sea and protection of the marine environment”ĪIS capabilities are recognized as critical parts of the US e-Navigation strategy in the CMTS e-Navigation Strategic Action plan. The Committee on the Marine Transportation System (CMTS) e-Navigation Strategic Action Plan (“e-Navigation Strategic Action Plan” 2012) quotes the International Maritime Organization (IMO) definition of e-Navigation as: In the United States, it is intended that this additional information be transmitted from shore-side AIS base stations in a binary message format as part of an overall e-Navigation strategy. This includes meteorological and hydrographic data, carriage of dangerous cargos, safety and security zones, status of locks and Aids to Navigation (AtoNs), and other port/waterway safety information. In addition to providing a means for maritime administrations to effectively track the movement of vessels in coastal and inland waters, AIS can be a means to transmit information to ships in port or underway that contributes to safety-of-navigation and protection of the environment. The Automatic Identification System (AIS) is an autonomous and continuous broadcast system that exchanges maritime safety/security information between participating vessels and shore stations. Physical Scientist and Project Manager, US Coast Guard R&D Center, USA Senior Program Manager, Alion Science and Technology, USAĮ-Navigation Team Leader, US Army Corps of Engineers, USA The checker found problems which may prevent the document from being fully accessible.This paper describes the ASM transmit architecture and the testing that has been done to date to validate this architecture Phase Two_REM.pdf Report created by: Nellie Kamau, Catalog Librarian, Organization: DOT, NTL Acrobat Accessibility Report Accessibility Report Filename: Supporting Secure and Resilient. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |