{
  "vessels": {
    "self": {
      "propulsion": {
        "port": {
          "alternatorVoltage": {
            "meta": {
              "zones": [{
                "upper": 10.5,
                "state": "alarm",
                "message": "Fault: very low voltage"
              }, {
                "lower": 10.5,
                "upper": 11.5,
                "state": "warn",
                "message": "Low voltage, battery near empty"
              }, {
                "lower": 11.5,
                "upper": 12,
                "state": "alert",
                "message": "Low voltage, battery charge low"
              }, {
                "lower": 12.8,
                "upper": 14.5,
                "state": "alert",
                "message": "Charging"
              }, {
                "lower": 14.5,
                "upper": 15,
                "state": "alarm",
                "message": "Voltage too high"
              }, {
                "lower": 15,
                "state": "alarm",
                "message": "Voltage too high, out of range"
              }]
            }
          }
        }
      }
    }
  }
}