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From the combined VTS and pilots scheduling center in, Lisbon VTS Tower, monitoring the river Tejo A vessel traffic service (VTS) is a marine traffic monitoring system established by harbour or port authorities, similar to air traffic control for aircraft. Typical VTS systems use radar, closed-circuit television (CCTV), VHF radiotelephony and automatic identification system to keep track of vessel movements and provide navigational safety in a limited geographical area
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Coordinates are in the WGS84 datum