Vessel tracking, public regarding vessel positions, and movements, ports, traffic voyage details, shipping. Marine traffic is a commercial company but provides some free data. This company combines satellite data with a vast network of terrestrial stations. The initial data collection is based on the Automatic Identification System AIS. For each position, the company provides LON, LAT, VESSEL MMSI, STATUS, SPEED, COURSE, HEADING, and TIMESTAMP UTC. For each port call, the company provides PORT ID, PORT NAME, VESSEL MMSI, TIMESTAMP, ARR/ DEP. This company may also provide additional vessel parameters e.g. vessel name, type dimensions, flag, etc. Free for online map charge for data download.