FleetMon

FleetMon Port Calls & ETA API (Retired)

Retired. Port intelligence surface of the FleetMon API - port search (GET /portsearch/), port calls per port and per vessel (GET /port/portcalls/, GET /vessel/portcalls/), vessels currently in port (GET /port/inport/), expected port arrivals (GET /port/arrivals/), next port and ETA calculation (GET /vessel/{vessel_id}/ports/next/), distance to port, voyage planning ETA and distance estimations (POST /voyage-planning/), and zone monitoring calls. Endpoints are grounded in the archived Swagger 2.0 definition but are no longer live - the surface migrated to MarineTraffic / Kpler AIS.

GitHub OpenAPI

Specifications

⚙
OpenAPI
https://raw.githubusercontent.com/api-evangelist/fleetmon/refs/heads/main/openapi/fleetmon-openapi.yml

Other Resources

🔗
ArchivedAPIReference
http://web.archive.org/web/20250106234623/https://developer.fleetmon.com/reference/

OpenAPI Specification

fleetmon-openapi.yml Raw ↑ 
basePath: /
consumes:
- application/json
definitions:
  ais_position-response:
    properties:
      ais_position_items:
        items:
          $ref: '#/definitions/ais_position-response-ais_position_item'
        type: array
        xml:
          wrapped: true
          x-add-datatype: true
      request_limit_info:
        description: Information about usage and limits of this endpoint. Included if query parameter
          `request_limit_info` is `true`
        properties:
          left_requests:
            description: Number of requests left at this moment to this endpoint. If not included there
              is no limit.
            type: integer
            xml:
              x-add-datatype: true
          max_requests:
            description: Maximum number of requests to this endpoint within 30 days. If not included there
              is no limit.
            type: integer
            xml:
              x-add-datatype: true
          used_requests:
            description: Number of requests to this endpoint within the last 30 days.
            type: integer
            xml:
              x-add-datatype: true
        required:
        - used_requests
        title: request-limit-info
        type: object
        xml:
          x-add-datatype: true
    required:
    - ais_position_items
    type: object
    xml:
      name: response
      namespace: https://apiv2.fleetmon.com
      x-extra-attributes:
        timestamp:
          type: date-time
  ais_position-response-ais_position_item:
    properties:
      callsign:
        description: vessel's callsign via AIS
        format: ascii
        type: string
        x-nullable: true
        xml:
          x-add-datatype: true
      course:
        description: course over ground in degrees north-ward
        format: float
        type: number
        x-nullable: true
        xml:
          x-add-datatype: true
      destination:
        description: vessel's destination via AIS
        format: ascii
        type: string
        x-nullable: true
        xml:
          x-add-datatype: true
      draught:
        description: vessel's draught in m
        format: float
        type: number
        x-nullable: true
        xml:
          x-add-datatype: true
      eta:
        description: estimated time of arrival via AIS
        format: date-time
        type: string
        x-nullable: true
        xml:
          x-add-datatype: true
      heading:
        description: true heading of keel (hull) via AIS
        type: integer
        x-nullable: true
        xml:
          x-add-datatype: true
      imo:
        description: IMO number
        type: integer
        x-nullable: true
        xml:
          x-add-datatype: true
      latitude:
        description: position latitude received via AIS
        format: float
        type: number
        xml:
          x-add-datatype: true
      length:
        description: vessel's length in m
        type: integer
        xml:
          x-add-datatype: true
      longitude:
        description: position longitude received via AIS
        format: float
        type: number
        xml:
          x-add-datatype: true
      maneuver:
        description: special maneuver / blue sign flag
        type: boolean
        x-nullable: true
        xml:
          x-add-datatype: true
      mmsi:
        description: vessel's MMSI number via AIS
        type: integer
        xml:
          x-add-datatype: true
      name:
        description: vessel's name via AIS
        type: string
        xml:
          x-add-datatype: true
      nav_status:
        description: navigation status as reported via AIS
        type: integer
        x-nullable: true
        xml:
          x-add-datatype: true
      nmea:
        description: raw NMEA string containing AIS position message
        items:
          format: ascii
          type: string
          xml:
            name: item
            x-add-datatype: true
        type: array
        xml:
          wrapped: true
          x-add-datatype: true
      nmea_svd:
        description: raw NMEA string containing AIS static and voyage related data message
        items:
          format: ascii
          type: string
          xml:
            name: item
            x-add-datatype: true
        type: array
        xml:
          wrapped: true
          x-add-datatype: true
      shiptype:
        description: vessel's type of ship code via AIS
        type: integer
        xml:
          x-add-datatype: true
      source:
        description: either "terrestrial" or "satellite"
        format: ascii
        type: string
        xml:
          x-add-datatype: true
      speed:
        description: speed over ground in knots
        format: float
        type: number
        x-nullable: true
        xml:
          x-add-datatype: true
      timestamp:
        description: time of reception of AIS position report
        format: date-time
        type: string
        xml:
          x-add-datatype: true
      timestamp_svd:
        description: time of reception of AIS static and voyage related data report
        format: date-time
        type: string
        xml:
          x-add-datatype: true
      transponder_class:
        description: AIS Transponder class, either "A" or "B"
        format: ascii
        type: string
        xml:
          x-add-datatype: true
      turn:
        description: rate of turn in °/min, it might also contain "fast left" or "fast right" if > ±708°/min
        type: integer
        x-nullable: true
        xml:
          x-add-datatype: true
      width:
        description: vessel's width in m
        type: integer
        xml:
          x-add-datatype: true
    required:
    - timestamp
    - course
    - nav_status
    - heading
    - latitude
    - longitude
    - maneuver
    - mmsi
    - source
    - speed
    - transponder_class
    - turn
    title: ais_position-item
    type: object
    xml:
      name: ais_position_item
      x-add-datatype: true
  ais_static-response:
    properties:
      ais_static_items:
        items:
          $ref: '#/definitions/ais_static-response-ais_static_item'
        type: array
        xml:
          wrapped: true
          x-add-datatype: true
      request_limit_info:
        description: Information about usage and limits of this endpoint. Included if query parameter
          `request_limit_info` is `true`
        properties:
          left_requests:
            description: Number of requests left at this moment to this endpoint. If not included there
              is no limit.
            type: integer
            xml:
              x-add-datatype: true
          max_requests:
            description: Maximum number of requests to this endpoint within 30 days. If not included there
              is no limit.
            type: integer
            xml:
              x-add-datatype: true
          used_requests:
            description: Number of requests to this endpoint within the last 30 days.
            type: integer
            xml:
              x-add-datatype: true
        required:
        - used_requests
        title: request-limit-info
        type: object
        xml:
          x-add-datatype: true
    required:
    - ais_static_items
    type: object
    xml:
      name: response
      namespace: https://apiv2.fleetmon.com
      x-extra-attributes:
        timestamp:
          type: date-time
  ais_static-response-ais_static_item:
    properties:
      callsign:
        description: vessel's callsign via AIS
        format: ascii
        type: string
        x-nullable: true
        xml:
          x-add-datatype: true
      destination:
        description: vessel's destination via AIS
        format: ascii
        type: string
        x-nullable: true
        xml:
          x-add-datatype: true
      draught:
        description: vessel's draught in m
        format: float
        type: number
        x-nullable: true
        xml:
          x-add-datatype: true
      eta:
        description: estimated time of arrival via AIS
        format: date-time
        type: string
        x-nullable: true
        xml:
          x-add-datatype: true
      imo:
        description: IMO number
        type: integer
        x-nullable: true
        xml:
          x-add-datatype: true
      length:
        description: vessel's length in m
        type: integer
        xml:
          x-add-datatype: true
      mmsi:
        description: vessel's MMSI number via AIS
        type: integer
        xml:
          x-add-datatype: true
      name:
        description: vessel's name via AIS
        type: string
        xml:
          x-add-datatype: true
      nmea:
        description: raw NMEA string containing AIS static and voyage related data message
        items:
          format: ascii
          type: string
          xml:
            name: item
            x-add-datatype: true
        type: array
        xml:
          wrapped: true
          x-add-datatype: true
      shiptype:
        description: vessel's type of ship code via AIS
        type: integer
        xml:
          x-add-datatype: true
      source:
        description: either "terrestrial" or "satellite"
        format: ascii
        type: string
        xml:
          x-add-datatype: true
      timestamp:
        description: time of reception of AIS static and voyage related data report
        format: date-time
        type: string
        xml:
          x-add-datatype: true
      transponder_class:
        description: AIS Transponder class, either "A" or "B"
        format: ascii
        type: string
        xml:
          x-add-datatype: true
      width:
        description: vessel's width in m
        type: integer
        xml:
          x-add-datatype: true
    required:
    - timestamp
    - mmsi
    - name
    - shiptype
    - length
    - width
    - source
    - transponder_class
    - callsign
    - destination
    - draught
    - eta
    - imo
    title: ais_static-item
    type: object
    xml:
      name: ais_static_item
      x-add-datatype: true
  error-message-response:
    properties:
      code:
        description: correlates to the HTTP status code
        format: int32
        type: integer
        xml:
          x-add-datatype: true
      description:
        description: more detailed description
        type: string
        xml:
          x-add-datatype: true
      message:
        description: short error message
        type: string
        xml:
          x-add-datatype: true
      status:
        description: '"error"'
        example: error
        format: ascii
        type: string
        xml:
          x-add-datatype: true
    required:
    - status
    - message
    - description
    - code
    type: object
  fleet-listing-add:
    properties:
      vessels:
        items:
          $ref: '#/definitions/fleet-listing-add-vessel'
        type: array
        xml:
          wrapped: true
          x-add-datatype: true
    required:
    - vessels
    type: object
    xml:
      name: fleet_listing_add
      namespace: https://apiv2.fleetmon.com
  fleet-listing-add-vessel:
    properties:
      extra:
        additionalProperties: true
        description: client-specific extra informations for this vessel
        title: fleet-listing-add-vessel-extra
        type: object
        x-nullable: true
        xml:
          x-add-datatype: true
      imo_number:
        description: unique International Maritime Organization (IMO) vessel number
        format: int64
        type: integer
        x-nullable: true
        xml:
          x-add-datatype: true
      mmsi_number:
        description: 9 decimal digits Maritime Mobile Service Identity (connector between AIS message
          typs)
        format: int64
        type: integer
        x-nullable: true
        xml:
          x-add-datatype: true
      note:
        default: ''
        type: string
        xml:
          x-add-datatype: true
      tags:
        items:
          format: ascii
          type: string
          xml:
            name: item
            x-add-datatype: true
        type: array
        x-nullable: true
        xml:
          wrapped: true
          x-add-datatype: true
      vessel_id:
        default: -1
        description: vessel ID
        format: int64
        type: integer
        xml:
          x-add-datatype: true
    type: object
    xml:
      name: vessel
      x-add-datatype: true
  fleet-listing-replace:
    properties:
      vessels:
        items:
          $ref: '#/definitions/fleet-listing-add-vessel'
        type: array
        xml:
          wrapped: true
          x-add-datatype: true
    required:
    - vessels
    type: object
    xml:
      name: fleet_listing_replace
      namespace: https://apiv2.fleetmon.com
  fleet-request-edit-vessel:
    properties:
      extra:
        additionalProperties: true
        description: client-specific extra informations for this vessel
        title: fleet-request-edit-vessel-extra
        type: object
        x-nullable: true
        xml:
          x-add-datatype: true
      note:
        default: ''
        type: string
        xml:
          x-add-datatype: true
      tags:
        items:
          format: ascii
          type: string
          xml:
            name: item
            x-add-datatype: true
        type: array
        x-nullable: true
        xml:
          wrapped: true
          x-add-datatype: true
    type: object
    xml:
      name: fleet_request_edit_vessel
      namespace: https://apiv2.fleetmon.com
  fleet-response-add-vessel-done:
    allOf:
    - $ref: '#/definitions/fleet-listing-add-vessel'
    - properties:
        detail_url:
          description: URL path to this item
          type: string
      required:
      - detail_url
      type: object
    xml:
      name: item
      x-add-datatype: true
  fleet-response-add-vessel-failed:
    allOf:
    - $ref: '#/definitions/fleet-listing-add-vessel'
    - properties:
        message:
          description: description for failure
          type: string
      required:
      - message
      type: object
    xml:
      name: item
      x-add-datatype: true
  fleet-response-delete:
    properties:
      items_removed:
        description: number of removed items
        format: int64
        type: integer
        xml:
          x-add-datatype: true
      message:
        type: string
        xml:
          x-add-datatype: true
      request_limit_info:
        description: Information about usage and limits of this endpoint. Included if query parameter
          `request_limit_info` is `true`
        properties:
          left_requests:
            description: Number of requests left at this moment to detail URLs of this endpoint. If not
              included there is no limit.
            type: integer
            xml:
              x-add-datatype: true
          left_requests_overall:
            description: Number of requests left at this moment to this endpoint. If not included there
              is no limit.
            type: integer
            xml:
              x-add-datatype: true
          max_requests:
            description: Maximum number of requests to detail URLs of this endpoint within 30 days. If
              not included there is no limit.
            type: integer
            xml:
              x-add-datatype: true
          max_requests_overall:
            description: Maximum number of requests to this endpoint within 30 days. If not included there
              is no limit.
            type: integer
            xml:
              x-add-datatype: true
          used_requests:
            description: Number of requests to detail URLs of this endpoint within the last 30 days.
            type: integer
            xml:
              x-add-datatype: true
          used_requests_overall:
            description: Number of requests to this endpoint within the last 30 days.
            type: integer
            xml:
              x-add-datatype: true
        required:
        - used_requests_overall
        - used_requests
        title: request-limit-info
        type: object
        xml:
          x-add-datatype: true
      size_limit_info:
        description: Information about usage and limits of this endpoint. Included if query parameter
          `size_limit_info` is `true`
        properties:
          current_changes:
            description: Number of vessel changes in this endpoint within the last 30 days.
            type: integer
            xml:
              x-add-datatype: true
          current_list_size:
            description: Number of vessels currently in this endpoint.
            type: integer
            xml:
              x-add-datatype: true
          max_changes:
            description: Maximum number of vessel changes in this endpoint within the last 30 days.
            type: integer
            xml:
              x-add-datatype: true
          max_list_size:
            description: Maximum number of vessels in this endpoint.
            type: integer
            xml:
              x-add-datatype: true
        required:
        - current_changes
        - current_list_size
        - max_changes
        - max_list_size
        title: size-limit-info
        type: object
        xml:
          x-add-datatype: true
      status:
        description: '"success"'
        example: success
        type: string
        xml:
          x-add-datatype: true
    required:
    - status
    - message
    - items_removed
    type: object
    xml:
      name: response
      namespace: https://apiv2.fleetmon.com
      x-extra-attributes:
        timestamp:
          type: date-time
  fleet-response-edit:
    properties:
      changed:
        description: list of changed attributes
        items:
          type: string
          xml:
            name: item
            x-add-datatype: true
        type: array
        xml:
          wrapped: true
          x-add-datatype: true
      message:
        type: string
        xml:
          x-add-datatype: true
      request_limit_info:
        description: Information about usage and limits of this endpoint. Included if query parameter
          `request_limit_info` is `true`
        properties:
          left_requests:
            description: Number of requests left at this moment to detail URLs of this endpoint. If not
              included there is no limit.
            type: integer
            xml:
              x-add-datatype: true
          left_requests_overall:
            description: Number of requests left at this moment to this endpoint. If not included there
              is no limit.
            type: integer
            xml:
              x-add-datatype: true
          max_requests:
            description: Maximum number of requests to detail URLs of this endpoint within 30 days. If
              not included there is no limit.
            type: integer
            xml:
              x-add-datatype: true
          max_requests_overall:
            description: Maximum number of requests to this endpoint within 30 days. If not included there
              is no limit.
            type: integer
            xml:
              x-add-datatype: true
          used_requests:
            description: Number of requests to detail URLs of this endpoint within the last 30 days.
            type: integer
            xml:
              x-add-datatype: true
          used_requests_overall:
            description: Number of requests to this endpoint within the last 30 days.
            type: integer
            xml:
              x-add-datatype: true
        required:
        - used_requests_overall
        - used_requests
        title: request-limit-info
        type: object
        xml:
          x-add-datatype: true
      size_limit_info:
        description: Information about usage and limits of this endpoint. Included if query parameter
          `size_limit_info` is `true`
        properties:
          current_changes:
            description: Number of vessel changes in this endpoint within the last 30 days.
            type: integer
            xml:
              x-add-datatype: true
          current_list_size:
            description: Number of vessels currently in this endpoint.
            type: integer
            xml:
              x-add-datatype: true
          max_changes:
            description: Maximum number of vessel changes in this endpoint within the last 30 days.
            type: integer
            xml:
              x-add-datatype: true
          max_list_size:
            description: Maximum number of vessels in this endpoint.
            type: integer
            xml:
              x-add-datatype: true
        required:
        - current_changes
        - current_list_size
        - max_changes
        - max_list_size
        title: size-limit-info
        type: object
        xml:
          x-add-datatype: true
      status:
        description: '"success"'
        example: success
        type: string
        xml:
          x-add-datatype: true
    required:
    - status
    - message
    - changed
    type: object
    xml:
      name: response
      namespace: https://apiv2.fleetmon.com
      x-extra-attributes:
        timestamp:
          type: date-time
  fleet-response-listing:
    properties:
      request_limit_info:
        description: Information about usage and limits of this endpoint. Included if query parameter
          `request_limit_info` is `true`
        properties:
          left_requests:
            description: Number of requests left at this moment to listing URL of this endpoint. If not
              included there is no limit.
            type: integer
            xml:
              x-add-datatype: true
          left_requests_overall:
            description: Number of requests left at this moment to this endpoint. If not included there
              is no limit.
            type: integer
            xml:
              x-add-datatype: true
          max_requests:
            description: Maximum number of requests to listing URL of this endpoint within 30 days. If
              not included there is no limit.
            type: integer
            xml:
              x-add-datatype: true
          max_requests_overall:
            description: Maximum number of requests to this endpoint within 30 days. If not included there
              is no limit.
            type: integer
            xml:
              x-add-datatype: true
          used_requests:
            description: Number of requests to listing URL of this endpoint within the last 30 days.
            type: integer
            xml:
              x-add-datatype: true
          used_requests_overall:
            description: Number of requests to this endpoint within the last 30 days.
            type: integer
            xml:
              x-add-datatype: true
        required:
        - used_requests_overall
        - used_requests
        title: request-limit-info
        type: object
        xml:
          x-add-datatype: true
      size_limit_info:
        description: Information about usage and limits of this endpoint. Included if query parameter
          `size_limit_info` is `true`
        properties:
          current_changes:
            description: Number of vessel changes in this endpoint within the last 30 days.
            type: integer
            xml:
              x-add-datatype: true
          current_list_size:
            description: Number of vessels currently in this endpoint.
            type: integer
            xml:
              x-add-datatype: true
          max_changes:
            description: Maximum number of vessel changes in this endpoint within the last 30 days.
            type: integer
            xml:
              x-add-datatype: true
          max_list_size:
            description: Maximum number of vessels in this endpoint.
            type: integer
            xml:
              x-add-datatype: true
        required:
        - current_changes
        - current_list_size
        - max_changes
        - max_list_size
        title: size-limit-info
        type: object
        xml:
          x-add-datatype: true
      vessels:
        items:
          $ref: '#/definitions/fleet-response-listing-vessel'
        type: array
        xml:
          wrapped: true
          x-add-datatype: true
    required:
    - vessels
    type: object
    xml:
      name: response
      namespace: https://apiv2.fleetmon.com
      x-extra-attributes:
        timestamp:
          type: date-time
  fleet-response-listing-add:
    properties:
      items_added:
        items:
          $ref: '#/definitions/fleet-response-add-vessel-done'
        type: array
        xml:
          wrapped: true
          x-add-datatype: true
      items_existing:
        items:
          $ref: '#/definitions/fleet-response-add-vessel-done'
        type: array
        xml:
          wrapped: true
          x-add-datatype: true
      items_failed:
        items:
          $ref: '#/definitions/fleet-response-add-vessel-failed'
        type: array
        xml:
          wrapped: true
          x-add-datatype: true
      request_limit_info:
        description: Information about usage and limits of this endpoint. Included if query parameter
          `request_limit_info` is `true`
        properties:
          left_requests:
            description: Number of requests left at this moment to listing URL of this endpoint. If not
              included there is no limit.
            type: integer
            xml:
              x-add-datatype: true
          left_requests_overall:
            description: Number of requests left at this moment to this endpoint. If not included there
              is no limit.
            type: integer
            xml:
              x-add-datatype: true
          max_requests:
            description: Maximum number of requests to listing URL of this endpoint within 30 days. If
              not included there is no limit.
            type: integer
            xml:
              x-add-datatype: true
          max_requests_overall:
            description: Maximum number of requests to this endpoint within 30 days. If not included there
              is no limit.
            type: integer
            xml:
              x-add-datatype: true
          used_requests:
            description: Number of requests to listing URL of this endpoint within the last 30 days.
            type: integer
            xml:
              x-add-datatype: true
          used_requests_overall:
            description: Number of requests to this endpoint within the last 30 days.
            type: integer
            xml:
              x-add-datatype: true
        required:
        - used_requests_overall
        - used_requests
        title: request-limit-info
        type: object
        xml:
          x-add-datatype: true
      size_limit_info:
        description: Information about usage and limits of this endpoint. Included if query parameter
          `size_limit_info` is `true`
        properties:
          current_changes:
            description: Number of vessel changes in this endpoint within the last 30 days.
            type: integer
            xml:
              x-add-datatype: true
          current_list_size:
            description: Number of vessels currently in this endpoint.
            type: integer
            xml:
              x-add-datatype: true
          max_changes:
            description: Maximum number of vessel changes in this endpoint within the last 30 days.
            type: integer
            xml:
              x-add-datatype: true
          max_list_size:
            description: Maximum number of vessels in this endpoint.
            type: integer
            xml:
              x-add-datatype: true
        required:
        - current_changes
        - current_list_size
        - max_changes
        - max_list_size
        title: size-limit-info
        type: object
        xml:
          x-add-datatype: true
      success:
        type: boolean
        xml:
          x-add-datatype: true
    required:
    - success
    type: object
    xml:
      name: response
      namespace: https://apiv2.fleetmon.com
      x-extra-attributes:
        timestamp:
          type: date-time
  fleet-response-listing-replace:
    properties:
      items_added:
        items:
          $ref: '#/definitions/fleet-response-add-vessel-done'
        type: array
        xml:
          wrapped: true
          x-add-datatype: true
      items_failed:
        items:
          $ref: '#/definitions/fleet-response-add-vessel-failed'
        type: array
        xml:
          wrapped: true
          x-add-datatype: true
      request_limit_info:
        description: Information about usage and limits of this endpoint. Included if query parameter
          `request_limit_info` is `true`
        properties:
          left_requests:
            description: Number of requests left at this moment to listing URL of this endpoint. If not
              included there is no limit.
            type: integer
            xml:
              x-add-datatype: true
          left_requests_overall:
            description: Number of requests left at this moment to this endpoint. If not included there
              is no limit.
            type: integer
            xml:
              x-add-datatype: true
          max_requests:
            description: Maximum number of requests to listing URL of this endpoint within 30 days. If
              not included there is no limit.
            type: integer
            xml:
              x-add-datatype: true
          max_requests_overall:
            description: Maximum number of requests to this endpoint within 30 days. If not included there
              is no limit.
            type: integer
            xml:
              x-add-datatype: true
          used_requests:
            description: Number of requests to listing URL of this endpoint within the last 30 days.
            type: integer
            xml:
              x-add-datatype: true
          used_requests_overall:
            description: Number of requests to this endpoint within the last 30 days.
            type: integer
            xml:
              x-add-datatype: true
        required:
        - used_requests_overall
        - used_requests
        title: request-limit-info
        type: object
        xml:
          x-add-datatype: true
      size_limit_info:
        description: Information about usage and limits of this endpoint. Included if query parameter
          `size_limit_info` is `true`
        properties:
          current_changes:
            description: Number of vessel changes in this endpoint within the last 30 days.
            type: integer
            xml:
              x-add-datatype: true
          current_list_size:
            description: Number of vessels currently in this endpoint.
            type: integer
            xml:
              x-add-datatype: true
          max_changes:
            description: Maximum number of vessel changes in this endpoint within the last 30 days.
            type: integer
            xml:
              x-add-datatype: true
          max_list_size:
            description: Maximum number of vessels in this endpoint.
            type: integer
            xml:
              x-add-datatype: true
        required:
        - current_changes
        - current_list_size
        - max_changes
        - max_list_size
        title: size-limit-info
        type: object
        xml:
          x-add-datatype: true
      success:
        type: boolean
        xml:
          x-add-datatype: true
    required:
    - success
    type: object
    xml:
      name: response
      namespace: https://apiv2.fleetmon.com
      x-extra-attributes:
        timestamp:
          type: date-time
  fleet-response-listing-vessel:
    properties:
      callsign:
        format: ascii
        type: string
        x-nullable: true
        xml:
          x-add-datatype: true
      cn_iso2:
        format: ascii
        type: string
        x-nullable: true
        xml:
          x-add-datatype: true
      cn_name:
        type: string
        x-nullable: true
        xml:
          x-add-datatype: true
      detail_url:
        description: URL path to this item
        type: string
        xml:
          x-add-datatype: true
      extra:
        additionalProperties: true
        description: client-specific extra informations for this vessel
        title: fleet-response-listing-vessel

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# Full source: https://raw.githubusercontent.com/api-evangelist/fleetmon/refs/heads/main/openapi/fleetmon-openapi.yml