Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/46629
Title: Reception of Automatic Identification System (AIS) Message 21 from US Army Corps of Engineer AIS sites along the Upper Mississippi River, Mile 0 to 301
Authors: Zlotopolski, Jacob P.
Vest, John C.
Tabbert, Cory R.
Kress, Marin M.
Keywords: Navigation--Performance
Ships--Automatic identification systems
Radio broadcasting
Publisher: Engineer Research and Development Center (U.S.)
Series/Report no.: Technical Note (Engineer Research and Development Center (U.S.)) ; no. ERDC/CHL CHETN-IX-64
Abstract: The purpose of this study was to map the on-vessel receipt of message 21 broadcasts from shoreside Automatic Identification System (AIS) sites. Message 21 is one of 27 different AIS messages, and it is used to provide information about real and virtual aids to navigation (AtoNs). Virtual AtoNs are broadcast to warn mariners of hazards like temporary construction zones or submerged debris that may not be marked with a physical buoy. In this study, message 21 was broadcast from different shore-based AIS transceiver sites along the river. Equipment onboard the patrol vessel Pathfinder was monitored for receipt of message 21 during patrols on the Mississippi River that ranged from Lock and Dam (L&D) 22 to Cairo, Illinois, with the confluence of the Ohio River. The Pathfinder is owned by the US Army Corps of Engineers (USACE) and is based out of the St. Louis District (MVS). Understanding where vessels receive, or do not receive, message 21 has important implications for maritime safety in this heavily traveled portion of the inland waterway system.
Description: Technical Note
Gov't Doc #: ERDC/CHL CHETN-IX-64
Rights: Approved for Public Release; Distribution is Unlimited
URI: https://hdl.handle.net/11681/46629
http://dx.doi.org/10.21079/11681/46629
Size: 11 pages / 2.55 MB
Types of Materials: PDF
Appears in Collections:Technical Note

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