This example shows the use of an object containing the GreatCircle data

example-2.json

{
  "vessels": {
    "vessels.urn:mrn:imo:mmsi:230099999": {
      "navigation": {
        "course": {
          "crossTrackError": {
            "value": -8.67,
            "timestamp": "(...)",
            "$source": "(...)"
          },

          "bearingTrackTrue": {
            "value": 0.9162978572970231,
            "timestamp": "(...)",
            "$source": "(...)"
          },

          "bearingTrackMagnetic": {
            "value": 1.1986521,
            "timestamp": "(...)",
            "$source": "(...)"
          },

          "activeRoute": {
            "value": "/vessels/vessels.urn:mrn:imo:mmsi:230099999/resources/routes/urn:mrn:signalk:uuid:3dd34dcc-36bf-4d61-ba80-233799b25672",
            "timestamp": "(...)",
            "$source": "(...)"
          },

          "nextPoint": {
            "type": "Waypoint",
            "id": "/vessels/vessels.urn:mrn:imo:mmsi:230099999/resources/waypoints/urn:mrn:signalk:uuid:4fe4ff38-879a-46ed-9a7d-7caeea475241",
            "distance": 2407.6000020320143,
            "bearingTrue": 0.9162978572970231,
            "velocityMadeGood": 0.2572222873852017,
            "position": {
              "latitude": 49.287333333333336,
              "longitude": -123.1595
            },
            "timestamp": "(...)",
            "$source": "(...)",

            "greatCircle": {
              "bearingTrue": 0.9162978572970231
            }
          },

          "lastPoint": {
            "type": "Waypoint",
            "id": "/vessels/vessels.urn:mrn:imo:mmsi:230099999/resources/waypoints/urn:mrn:signalk:uuid:dd4a4c06-0c1d-4b5e-90c3-963649ee5e6d",
            "position": {
              "latitude": 49.287333333333336,
              "longitude": -123.1595
            },
            "timestamp": "(...)",
            "$source": "(...)"
          },

          "greatCircle": {
            "bearingTrackTrue": {
              "value": 0.9162978572970231,
              "timestamp": "(...)",
              "$source": "(...)"
            },

            "bearingTrackMagnetic": {
              "value": 1.1986521,
              "timestamp": "(...)",
              "$source": "(...)"
            }
          }
        }
      }
    }
  },
  "version": "v1",
  "self": "vessels.urn:mrn:imo:mmsi:230099999"
}