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Marlborough managed tide stations are located at:

AIS Messages

Stations transmit AIS messages 21 and 8 once every six minutes on each channel, offset by three minutes. Message 21 reports the station name and coordinates. Message 8 reports a composite tide height that considers inputs from both pressure and radar sensors.

NMEA Messages

The sensor types are:

  • D = Linear Displacement

The units are:

  • M = Meters

The sensor names are:

  • HTIDE = Tide Height

  • SDTID = Tide Height Standard Deviation

Data is available for:

  • Motuara Island on port 45060

  • Okukari Bay on port 45061

  • Te Weka on port 45062

Code Block
$WIXDR,D,1.148,M,HTIDE,D,0.016,M,SDTID,*6D

JSON Messages

More complete data is available via JSON messages, available on request. Message format is:

Code Block
languagejson
{
  "sensor_id": "pcn.motuara.tidestation.1",
  "timestamp": "20212022-1103-30T1709T04:1020:00Z",
  "measurement_id": "86989b1728e01e3b-99841a73-00989c2e-7febd16c-b20f23e60dfc29aba7cb9125",
  "tide_height": 10.123734,
  "tide_height_sd": 0.015022,
  "measurement_type": "pressure_sensor",
  "pressure_measure": 21.262871,
  "pressure_measure_sd": 0.015022,
  "radarais_water_rangelevel": null,
  "radar_level": null0.753,
  "radar_level_sd": null0.001538,
  "radar_statusrange": "offline"1.821,
  "radar_signal_strengthstatus": null"0",
  "aisradar_watersignal_levelstrength": null,
  "ais_timestamp": null
  }