{
  "@context": {
    "@version": 1.1,
    "@vocab": "https://schema.org/",
    "marinetraffic": "https://services.marinetraffic.com/api/",
    "schema": "https://schema.org/",
    "xsd": "http://www.w3.org/2001/XMLSchema#",
    "dcterms": "http://purl.org/dc/terms/",
    "geo": "http://www.w3.org/2003/01/geo/wgs84_pos#",
    "ais": "https://www.itu.int/ITU-R/M.1371/",

    "Vessel": {
      "@id": "schema:Vehicle",
      "@context": {
        "MMSI":         { "@id": "ais:mmsi",      "@type": "xsd:string" },
        "IMO":          { "@id": "ais:imo",       "@type": "xsd:string" },
        "SHIP_ID":      { "@id": "marinetraffic:shipId", "@type": "xsd:string" },
        "SHIPNAME":     { "@id": "schema:name" },
        "CALLSIGN":     { "@id": "ais:callSign",  "@type": "xsd:string" },
        "FLAG":         { "@id": "schema:countryOfOrigin" },
        "SHIPTYPE":     { "@id": "ais:shipType",  "@type": "xsd:integer" },
        "TYPE_NAME":    { "@id": "schema:category" },
        "LENGTH":       { "@id": "schema:height" },
        "BREADTH":      { "@id": "schema:width" },
        "DRAUGHT":      { "@id": "marinetraffic:draught", "@type": "xsd:decimal" },
        "DEAD_WEIGHT":  { "@id": "marinetraffic:deadweight", "@type": "xsd:decimal" },
        "GROSS_TONNAGE":{ "@id": "marinetraffic:grossTonnage", "@type": "xsd:decimal" },
        "BUILT":        { "@id": "schema:productionDate" }
      }
    },

    "VesselPosition": {
      "@id": "marinetraffic:VesselPosition",
      "@context": {
        "MMSI":      { "@id": "ais:mmsi", "@type": "xsd:string" },
        "SHIP_ID":   { "@id": "marinetraffic:shipId" },
        "LAT":       { "@id": "geo:lat",  "@type": "xsd:decimal" },
        "LON":       { "@id": "geo:long", "@type": "xsd:decimal" },
        "SPEED":     { "@id": "marinetraffic:speedOverGround", "@type": "xsd:decimal" },
        "COURSE":    { "@id": "marinetraffic:courseOverGround", "@type": "xsd:decimal" },
        "HEADING":   { "@id": "marinetraffic:heading", "@type": "xsd:decimal" },
        "STATUS":    { "@id": "ais:navigationalStatus" },
        "DESTINATION":{ "@id": "marinetraffic:aisDestination" },
        "ETA_AIS":   { "@id": "marinetraffic:aisEta",       "@type": "xsd:dateTime" },
        "ETA_PREDICTED":{ "@id": "marinetraffic:predictedEta","@type": "xsd:dateTime" },
        "DSRC":      { "@id": "marinetraffic:dataSource" },
        "TIMESTAMP": { "@id": "dcterms:date", "@type": "xsd:dateTime" }
      }
    },

    "PortCall": {
      "@id": "marinetraffic:PortCall",
      "@context": {
        "MMSI":         { "@id": "ais:mmsi" },
        "SHIP_ID":      { "@id": "marinetraffic:shipId" },
        "PORT_ID":      { "@id": "marinetraffic:portId" },
        "PORT_NAME":    { "@id": "schema:name" },
        "UNLOCODE":     { "@id": "marinetraffic:unlocode" },
        "MOVE_TYPE":    { "@id": "marinetraffic:moveType", "@type": "xsd:integer" },
        "TIMESTAMP_UTC":{ "@id": "dcterms:date", "@type": "xsd:dateTime" },
        "VOYAGE_DURATION":{ "@id":"marinetraffic:voyageDurationHours", "@type":"xsd:decimal" },
        "TIME_IN_PORT": { "@id":"marinetraffic:timeInPortHours", "@type":"xsd:decimal" }
      }
    },

    "BerthCall": {
      "@id": "marinetraffic:BerthCall",
      "@context": {
        "MMSI":         { "@id": "ais:mmsi" },
        "PORT_ID":      { "@id": "marinetraffic:portId" },
        "BERTH_ID":     { "@id": "marinetraffic:berthId" },
        "BERTH_NAME":   { "@id": "schema:name" },
        "TERMINAL_ID":  { "@id": "marinetraffic:terminalId" },
        "TIMESTAMP_UTC":{ "@id": "dcterms:date", "@type": "xsd:dateTime" }
      }
    },

    "Port": {
      "@id": "schema:Place",
      "@context": {
        "PORT_ID":     { "@id": "marinetraffic:portId" },
        "PORT_NAME":   { "@id": "schema:name" },
        "UNLOCODE":    { "@id": "marinetraffic:unlocode" },
        "COUNTRY_CODE":{ "@id": "schema:addressCountry" },
        "LAT":         { "@id": "geo:lat",  "@type": "xsd:decimal" },
        "LON":         { "@id": "geo:long", "@type": "xsd:decimal" },
        "TIMEZONE":    { "@id": "schema:timeZone" },
        "CONGESTION_INDEX": { "@id": "marinetraffic:portCongestionIndex", "@type": "xsd:decimal" }
      }
    },

    "VoyageForecast": {
      "@id": "marinetraffic:VoyageForecast",
      "@context": {
        "MMSI":                          { "@id": "ais:mmsi" },
        "PREDICTED_DESTINATION_PORT":    { "@id": "marinetraffic:predictedDestinationPort" },
        "PREDICTED_DESTINATION_UNLOCODE":{ "@id": "marinetraffic:predictedDestinationUnlocode" },
        "PREDICTED_DESTINATION_PROBABILITY":{ "@id": "marinetraffic:destinationProbability", "@type":"xsd:decimal" },
        "PREDICTED_ETA_UTC":             { "@id": "marinetraffic:predictedEta", "@type": "xsd:dateTime" },
        "ROUTE_DISTANCE_NM":             { "@id": "marinetraffic:routeDistanceNm", "@type":"xsd:decimal" },
        "SPEED_AVG_KN":                  { "@id": "marinetraffic:averageSpeedKn", "@type":"xsd:decimal" }
      }
    },

    "Fleet": {
      "@id": "marinetraffic:Fleet",
      "@context": {
        "fleet_id":    { "@id": "marinetraffic:fleetId" },
        "name":        { "@id": "schema:name" },
        "vessels":     { "@id": "marinetraffic:vessels", "@container": "@list" }
      }
    }
  }
}