Date-Ship-Port triplet data based on AIS data

The data format consists of lines containing associations of ships with ports from AIS data. Triplets of date, ship, and port are provided to identify ship journeys between ports. This dataset was constructed using AIS data from the following sources: AISHUB (https://www.aishub.net/ ) NOAA (https://marinecadastre.gov/AIS/) DMA.DK (https://dma.dk/safety-at-sea/navigational-information/download-data)