How AIS Works: An Overview by PSICOMPANY.COM

More In depth Marine AIS product Information at http://www.psicompany.com/ais

The acronym AIS stands for Automatic Identification System. We at PSICOMPANY.COM are principally involved in marine based AIS systems.

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AIS was created to give vessel operators the ability to gather and distribute electronic navigational data information to other mariners, including those requiring navigational data from those who may be out of visual range and those who may have geographic obstructions in their navigational path.

Picture in your mind; a modern shipboard radar or an electronic chart display or chartplotter that includes a symbol capacity for every significant ship within VHF radio range, each as desired with a velocity vector (indicating heading and speed). Each ship "symbol" could reflect the actual size of the ship, with position to linked to GPS or differential GPS accuracy. By "pointing and clicking" on a ship symbol, you could acquire the ship name, speed and course, classification, call sign, MMSI, registration number, and much more. Historical ships plotting information, closest point of approach, time to closest point of approach and additional navigation information, more accurate and timely than information available from an automatic radar plotting aid, could also be available.

Display information previously available only to modern Vessel Traffic Service operations centers can now be available to every AIS - equipped ship as we will discuss.
With this navigational data, you could hail any vessel over marine VHF by specific name, rather than by "ship off my starboard bow" or some other imprecise means. Or you could access that vessel directly using GMDSS equipment. Also, you could receive from the vessel, or send to the vessel, short safety-related text messages.

The AIS is a shipboard broadcast system that acts like a smart transponder. It operates in the VHF maritime band, and has capacity of conducting 4,500 navigation reports per minute with navigational update capacity to every two seconds. It utilizes Self-Organizing Time Division Multiple Access (SOTDMA) modulation to meet a high broadcast rate potential, ensuring reliable ship-to-ship, or ship-to-shore operations.

Narrated by: Richard Hart
http://www.richardhart.com

Category:

Science & Technology

Tags:

• ais
• automatic
• identification
• system
• uais
• universal
• marine
• electronics
• gps
• dgps
• vts
• navigation
• communication
• vessel
• tracking

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This Marine AIS overview explains the difference between Class "A" and Class "B" Marine Automatic Identification Systems (AIS). It also includes a brief description of "Receive Only" (AIS).