Sea Technology

MAR 2017

The industry's recognized authority for design, engineering and application of equipment and services in the global ocean community

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Page 15 of 68 March 2017 / st 15 safety, data and communications systems can be set up to automatically report their host vessel's position four times a day as mandated by the IMO. Yet AIS is fundamentally dif- ferent to these LRIT (long-range identi•cation and tracking) systems in two ways. First, it offers public access; terrestrial AIS data can be viewed for free both aƒoat and ashore via browser-based services provided by a number of companies and organizations, and anyone who chooses a subscription- based service can also view satellite AIS. Second, the up- dates are much more frequent, currently around every 90 min., and are likely to get even faster very soon. More on that later. These advantages mean that AIS is the fastest and most accurate vessel tracking service available, which makes it a highly valuable tool for vessel and ƒeet management. Fur- thermore, its ability to integrate with a wide range of third- This screenshot shows ships heading out into warmer water in the North Atlantic. As well as the current position of each, the viewer can also see the route that each ship has taken (the trail) as indicated by timed position xes.

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