{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://maritime.dnv.com/api/cs-iacs-customer/schemas/vessel",
  "title": "DNV Classified Vessel",
  "description": "Schema representing a vessel in the DNV classification register, including class status, certificates, and survey records.",
  "type": "object",
  "required": ["imoNumber", "vesselName", "classStatus"],
  "properties": {
    "imoNumber": {
      "type": "string",
      "description": "IMO vessel identification number assigned by the International Maritime Organization",
      "pattern": "^[0-9]{7}$"
    },
    "vesselName": {
      "type": "string",
      "description": "Registered name of the vessel",
      "maxLength": 100
    },
    "callSign": {
      "type": "string",
      "description": "Vessel radio call sign"
    },
    "flagState": {
      "type": "string",
      "description": "ISO 3166-1 alpha-2 country code for the flag state",
      "pattern": "^[A-Z]{2}$"
    },
    "shipType": {
      "type": "string",
      "description": "DNV ship type classification",
      "examples": ["General Cargo", "Bulk Carrier", "Tanker", "Container", "VLCC", "LNG Carrier", "Cruise Ship", "RORO"]
    },
    "classStatus": {
      "type": "string",
      "description": "Current classification status",
      "enum": ["CLASSED", "SUSPENDED", "WITHDRAWN", "DELETED"]
    },
    "classNotation": {
      "type": "string",
      "description": "Full DNV class notation string (e.g., 1A1 Tanker ESP CSR)",
      "examples": ["1A1 Tanker ESP CSR", "1A1 BulkCarrier ESP CSR", "1A1 ContainerShip CSR"]
    },
    "vesselOwner": {
      "type": "string",
      "description": "Legal vessel owner name"
    },
    "technicalManager": {
      "type": "string",
      "description": "Technical management company name"
    },
    "physicalDimensions": {
      "$ref": "#/$defs/VesselDimensions"
    },
    "tonnage": {
      "$ref": "#/$defs/VesselTonnage"
    },
    "buildInfo": {
      "$ref": "#/$defs/BuildInfo"
    },
    "propulsion": {
      "$ref": "#/$defs/PropulsionInfo"
    },
    "surveys": {
      "$ref": "#/$defs/SurveySummary"
    },
    "certificates": {
      "type": "array",
      "description": "Active classification and statutory certificates",
      "items": {
        "$ref": "#/$defs/Certificate"
      }
    }
  },
  "$defs": {
    "VesselDimensions": {
      "type": "object",
      "properties": {
        "lengthOverall": {
          "type": "number",
          "description": "Length overall in meters",
          "minimum": 0
        },
        "lengthBetweenPerpendiculars": {
          "type": "number",
          "description": "Length between perpendiculars in meters",
          "minimum": 0
        },
        "beam": {
          "type": "number",
          "description": "Moulded breadth in meters",
          "minimum": 0
        },
        "depth": {
          "type": "number",
          "description": "Moulded depth in meters",
          "minimum": 0
        },
        "draught": {
          "type": "number",
          "description": "Maximum design draught in meters",
          "minimum": 0
        }
      }
    },
    "VesselTonnage": {
      "type": "object",
      "properties": {
        "grossTonnage": {
          "type": "number",
          "description": "Gross tonnage (GT) per ITC 1969",
          "minimum": 0
        },
        "netTonnage": {
          "type": "number",
          "description": "Net tonnage (NT) per ITC 1969",
          "minimum": 0
        },
        "deadweightTonnage": {
          "type": "number",
          "description": "Deadweight tonnage (DWT) in metric tons",
          "minimum": 0
        }
      }
    },
    "BuildInfo": {
      "type": "object",
      "properties": {
        "buildYear": {
          "type": "integer",
          "description": "Year vessel was built",
          "minimum": 1800,
          "maximum": 2100
        },
        "shipyard": {
          "type": "string",
          "description": "Name of the shipyard where vessel was built"
        },
        "shipyardCountry": {
          "type": "string",
          "pattern": "^[A-Z]{2}$"
        },
        "hullNumber": {
          "type": "string",
          "description": "Shipyard hull construction number"
        },
        "hullMaterial": {
          "type": "string",
          "enum": ["STEEL", "ALUMINUM", "GRP", "WOOD", "COMPOSITE"]
        }
      }
    },
    "PropulsionInfo": {
      "type": "object",
      "properties": {
        "engineType": {
          "type": "string",
          "examples": ["2-stroke diesel", "4-stroke diesel", "Gas turbine", "Electric", "LNG dual-fuel"]
        },
        "engineMake": {
          "type": "string"
        },
        "enginePowerKW": {
          "type": "number",
          "description": "Main engine output in kilowatts",
          "minimum": 0
        },
        "numberOfEngines": {
          "type": "integer",
          "minimum": 1
        },
        "propellerType": {
          "type": "string",
          "enum": ["FIXED_PITCH", "CONTROLLABLE_PITCH", "AZIMUTH_THRUSTER", "VOITH_SCHNEIDER"]
        }
      }
    },
    "SurveySummary": {
      "type": "object",
      "properties": {
        "lastAnnualSurveyDate": {
          "type": "string",
          "format": "date"
        },
        "nextAnnualSurveyDue": {
          "type": "string",
          "format": "date"
        },
        "lastIntermediateSurveyDate": {
          "type": "string",
          "format": "date"
        },
        "nextIntermediateSurveyDue": {
          "type": "string",
          "format": "date"
        },
        "lastSpecialSurveyDate": {
          "type": "string",
          "format": "date"
        },
        "nextSpecialSurveyDue": {
          "type": "string",
          "format": "date"
        },
        "continuousSurveyMachinery": {
          "type": "boolean"
        }
      }
    },
    "Certificate": {
      "type": "object",
      "required": ["certificateType", "status"],
      "properties": {
        "certificateId": {
          "type": "string"
        },
        "certificateType": {
          "type": "string",
          "enum": ["CLASS", "STATUTORY", "SURVEY_REPORT", "ENTRY_IN_CLASS"]
        },
        "title": {
          "type": "string",
          "description": "Full certificate title"
        },
        "issueDate": {
          "type": "string",
          "format": "date"
        },
        "expiryDate": {
          "type": "string",
          "format": "date"
        },
        "status": {
          "type": "string",
          "enum": ["VALID", "EXPIRED", "WITHDRAWN"]
        },
        "issuingOffice": {
          "type": "string",
          "description": "DNV office that issued the certificate"
        }
      }
    }
  }
}