Abstract: A computer-implemented method of tracking vessel movement which comprises receiving a first vessel data message comprising a first vessel identifier, the first vessel data message having been transmitted at a first time and being associated with a first position; and receiving a second vessel data message comprising a second vessel identifier, the second vessel data message having been transmitted at a second time and being associated with a second position. The method also comprises determining if the first vessel identifier and the second vessel identifier are related. If the first vessel identifier and the second vessel identifier are related, a speed required for a vessel to have moved from the first position to the second position is determined; which is then determined if the speed is below a speed threshold; and if the speed is below the speed threshold, the first position is associated with the second position.

Abstract: A method is disclosed herein which comprises receiving a user request for map information at a server. The method also comprises requesting one or more base map tiles from a remote server based on the user request, the request including zoom level information and tile position information. At the server, the request is normalised based on the zoom information and the tile position information. The method then comprises defining a map view area based on the normalised request, obtaining vessel data relating to a plurality of vessels, determining for each of the plurality of vessels if the vessel lies within the map view area, and creating a new map tile comprising the vessel data for the vessels determined to lie within the map view area. The method then comprises causing display of the user requested base map tiles and overlaying the new map tile at a user device.

Abstract: Disclosed herein is a method of determining an optimal route for a vessel based on vessel traffic data. The method comprises receiving vessel traffic data relating to the movement of each of a plurality of vessels in a geographical region and defining sub-regions within the geographical region in which the vessel traffic data has similar characteristics. The method also comprises determining an optimal route for a vessel between two geographical points using a representation of the geographical region. The representation comprises nodes, and each node is associated with a respective defined sub-region.