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DataHub does the DataHub store Tracking data?

How to enable Tracking Logging in the DataHub to store GPS tracking positions

Matt Crockett avatar
Written by Matt Crockett
Updated today

The PredictWind DataHub allows you to log the tracking data which is sent to update your tracking page. When enabled, the DataHub records GPS and NMEA 2000 (N2K) data at the specified transmission interval and saves it in a log file for future reference.
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How Does the DataHub Tracking Logging Work?

  • If tracking is set to update every 60 minutes, the DataHub captures GPS and other available N2K values at that moment.

  • This data is both stored in the log file and sent to your tracking page.

  • If logging is turned off, the tracking data is deleted once it is sent to PredictWind.

How to enable Tracking Logging on the DataHub

  1. Connect to the DataHub via Wi-Fi.

  2. Open a Chrome or Safari browser, and type 10.10.10.1 in the URL bar.

  3. Log in with the default username admin and password admin.

  4. Click on Services > Tracking.

  5. Tick Enable Logging then click SAVE & APPLY.

How long does the DataHub store Tracking Logs?

You can configure log rotation settings based on your preference:

  • Log Rotation: Set as a Daily, Weekly or Monthly rotation schedule to store that time set of data per log file e.g. 60 minute tracking would store 24 entries when set to Daily. A Weekly rotation would have 24 x 7 = 168 entries.

  • Number Logs: The number of log files to keep. If, for example, log rotation is set to Weekly and Number Logs is set to 4 then 4 weeks worth of logs will be maintained.

  • The DataHub can store up to 10 months of logs when Log Rotation is set to Monthly and Number Logs is set to 10.

How can I view and download DataHub Tracking Logs?

To view and download DataHub Tracking log files, click on Services > Tracking > top menu Logs.

What data is stored in DataHub Tracking Logs?

DataHub Tracking logs contain the following data fields:

  1. Unixtime – The number of seconds since January 1, 1970 (UTC), used as a timestamp.

  2. Time – The recorded time of the tracking data entry.

  3. Date – The recorded date of the tracking data entry.

  4. Status – The GPS status or signal validity.

  5. Lat (Latitude) – The north-south position of the vessel in decimal degrees.

  6. Lon (Longitude) – The east-west position of the vessel in decimal degrees.

  7. SOG (Speed Over Ground) – The vessel’s speed relative to the ground (knots).

  8. COG (Course Over Ground) – The vessel’s actual direction of movement over the ground (degrees).

  9. Alt (m) (Altitude) – The vessel’s altitude above sea level (meters).

  10. TWS (True Wind Speed) – The actual wind speed measured in knots.

  11. TWD (True Wind Direction) – The direction the wind is coming from (degrees true).

  12. SOW (Speed Over Water) – The vessel’s speed relative to the water (knots).

  13. THW (True Heading Wind) – The wind direction relative to the vessel’s heading.

  14. Heave – Vertical movement of the vessel due to waves (meters).

  15. Yaw – Side-to-side rotation of the vessel around its vertical axis (degrees).

  16. Pitch – Forward and backward tilting of the vessel (degrees).

  17. Roll – Side-to-side tilting of the vessel (degrees).

  18. Variation – The difference between true north and magnetic north at the vessel’s location (degrees).

  19. Deviation – The vessel-specific magnetic compass error (degrees).

  20. HDT (True Heading) – The vessel’s heading relative to true north (degrees).

  21. HDM (Magnetic Heading) – The vessel’s heading relative to magnetic north (degrees).

  22. ATM (mb) (Atmospheric Pressure) – The barometric pressure at the vessel’s location (millibars).

  23. DPT (m) (Depth) – The water depth below the vessel (meters).

  24. Log – The total distance traveled by the vessel (nautical miles).

  25. Triplog – The distance traveled since the last reset (nautical miles).

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