There are many different types of AIS technology in use across the world, each behaving in a different way to the next.

From complex Class A units using Self Organised Time Division Multiple Access to the more simplistic Fixed Access Time Division Multiple Access used by aids to navigation; AIS offers a technical - and highly accurate - solution to finding out where vessels are and where they are heading.

All About AIS has summarised how each transmission type interacts within the AIS slot map system, as well as how each product type works within the protocols, and what technology maintains the AIS system's integrity.

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