{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/vesselfinder/main/json-schema/vesselfinder-vessel-schema.json",
  "title": "VesselFinder Vessel",
  "description": "A vessel record returned by VesselFinder's AIS API, containing dynamic AIS data and optional voyage and master particulars.",
  "type": "object",
  "properties": {
    "AIS": { "$ref": "#/$defs/AIS" },
    "VOYAGE": { "$ref": "#/$defs/Voyage" },
    "MASTERDATA": { "$ref": "#/$defs/MasterData" }
  },
  "$defs": {
    "AIS": {
      "type": "object",
      "description": "Dynamic AIS position and state for a vessel.",
      "properties": {
        "MMSI": { "type": "integer" },
        "TIMESTAMP": { "type": "string", "format": "date-time" },
        "LATITUDE": { "type": "number" },
        "LONGITUDE": { "type": "number" },
        "COURSE": { "type": "number" },
        "SPEED": { "type": "number" },
        "HEADING": { "type": "integer" },
        "NAVSTAT": { "type": "integer", "description": "AIS navigation status code (0-15)." },
        "IMO": { "type": "integer" },
        "NAME": { "type": "string" },
        "CALLSIGN": { "type": "string" },
        "TYPE": { "type": "integer", "description": "AIS ship-type code." },
        "A": { "type": "integer" },
        "B": { "type": "integer" },
        "C": { "type": "integer" },
        "D": { "type": "integer" },
        "DRAUGHT": { "type": "number" },
        "DESTINATION": { "type": "string" },
        "LOCODE": { "type": "string" },
        "ETA_AIS": { "type": "string" },
        "ETA": { "type": "string", "format": "date-time" },
        "SRC": { "type": "string", "enum": ["TER", "SAT"] },
        "ZONE": { "type": "string" },
        "ECA": { "type": "integer", "enum": [0, 1] }
      },
      "required": ["MMSI", "TIMESTAMP", "LATITUDE", "LONGITUDE"]
    },
    "Voyage": {
      "type": "object",
      "description": "Last completed port-call information for a vessel.",
      "properties": {
        "LOCODE": { "type": "string" },
        "DEPARTURE": { "type": "string", "format": "date-time" },
        "LASTPORT": { "type": "string" },
        "LASTCOUNTRY": { "type": "string" }
      }
    },
    "MasterData": {
      "type": "object",
      "description": "Static vessel particulars.",
      "properties": {
        "IMO": { "type": "integer" },
        "NAME": { "type": "string" },
        "FLAG": { "type": "string" },
        "TYPE": { "type": "string" },
        "BUILT": { "type": "integer" },
        "BUILDER": { "type": "string" },
        "OWNER": { "type": "string" },
        "MANAGER": { "type": "string" },
        "LENGTH": { "type": "number" },
        "BEAM": { "type": "number" },
        "MAXDRAUGHT": { "type": "number" },
        "GT": { "type": "integer" },
        "NT": { "type": "integer" },
        "DWT": { "type": "integer" },
        "TEU": { "type": "integer" },
        "CRUDE": { "type": "integer" }
      }
    }
  }
}