# Shiptrail > Shiptrail is a free live map of ships, built from AIS broadcasts. Each ship and each port has a page of its own with plain-text facts. Positions are not for navigation. They are relayed from AIS receivers, can be minutes old, and cover only the waters those receivers hear. ## Pages - /vessel/-: one ship. Her name, flag, type, size, photograph and last known position, where she was heading, and her recent voyages between ports. Example: https://shiptrail.io/vessel/368305000-manulani - /port/-: one port. The ships in port now, those heading there, and those that left in the last 48 hours. The locode is the five-letter UN/LOCODE. Example: https://shiptrail.io/port/ushnl-honolulu - /?ship=: the live map centred on one ship. It needs a browser; the two pages above hold the same facts as text. - /famous: hand-picked famous ships, with why each is famous and a link to her page. - /ports: how to read a port's lists, and the busiest ports right now. - /trends: patterns in the live fleet, such as ships waiting at anchor off a port. - /about: how the map works, what it cannot see, and the credits. - /guides: plain explainers on tracking ships and reading the map; /guides/how-to-track-ships answers how to track a ship live for free. - /agents: how to connect an AI assistant over MCP, free and with no key, at https://shiptrail.io/mcp. Four tools: search_ships (name, MMSI or IMO), get_ship (everything a ship's page shows), search_ports (name or UN/LOCODE) and get_port (a port's arrivals and departures); every answer carries the page URL to cite. ## On the map - Live: ships move on the map within seconds of being heard, and each one's card gives her speed and course, and the destination and arrival time her crew typed in. - Replay: a finished voyage on a ship's page can be played again on the map, up to 30 days back; zoomed in on a harbour, the map replays the ships heard there over the last 1 to 24 hours. How: /guides/replaying-a-voyage - Distance by sea: when a ship's two ports are known, her card and page show how far she has to go by the shortest sea route (Eurostat's SeaRoute network), worked out in the browser, and Preview route draws that route on the map with the time left at her speed now. How it is worked out and where it can be wrong: /guides/distance-to-port-by-sea - Home Screen: on a phone, Shiptrail can be added to the Home Screen and opens like an app, with a Text size setting. The steps are on /about. ## Where the data comes from - Positions: AISStream (https://aisstream.io/), which relays what volunteer receivers hear. - Positions in Norwegian waters: BarentsWatch (https://www.barentswatch.no/), under the NLOD 2.0 licence. - Positions in Finnish waters: Fintraffic / digitraffic.fi (https://www.digitraffic.fi/en/), under CC BY 4.0. - Ship details and photographs carry their own credits on each page. ## Notes - Not for navigation. Do not use it to plan or steer a voyage. - Please credit Shiptrail wherever its answers are used, for example "Data: Shiptrail, shiptrail.io", with a link to the ship's or port's page. - Quote a ship's position with the time shown beside it.