Live Data
Live Data streams your boat's instrument data to any phone or tablet browser in real time — so a coach on the chase boat, a tactician ashore, or anyone following the session can watch boatspeed, wind angle, VMG, and more as the boat sails. No waiting until the dock to see what was happening on the water.
Setup
Live Data requires a one-time configuration to connect your instrument system to Njord. To set it up, go to app.sailnjord.com/data/, select your boat, and choose Live Data from the sidebar. This will show setup instructions, including the IP address and port to enter in your instrument software.
Expedition is the most common setup; NMEA 0183 streaming is also supported. The yacht needs an internet connection — 4G, 5G, or Starlink.
Contact support if you need help with the instrument configuration.
Important: The computer or device running Expedition (or other streaming software) must have its system clock set accurately. Live Data timestamps are taken from that clock — if it is wrong by minutes or hours, the data will appear at the wrong position on any timeline display.
Viewing live data
Once the boat is set up and streaming, go to app.sailnjord.com/data/, select your boat, and choose Live Data from the sidebar. Multiple devices can connect simultaneously with no limit.
The display shows number readouts and rolling line charts for all metrics being streamed (typically wind direction and speed, boatspeed, VMG, heel, and any other logged channels). The rolling window shown is configurable (10 seconds to 10 minutes or longer depending on your setup).
Diagnosing connection issues
If the live display is blank or not updating:
- Check the instrument software is streaming. In Expedition, verify the UDP output is enabled and pointing to the correct IP address and port shown in Njord's Live Data setup page.
- Check the boat's internet connection. The yacht needs 4G, 5G, or Starlink.
- Reload the Live Data page in your browser — the connection is a WebSocket and occasionally needs a manual refresh to reconnect after a network interruption.
- Check the Njord Live Data setup page for the "Last received" timestamp — this confirms whether Njord's servers are seeing any incoming data at all.
Saving live data
By default, streamed live data is not stored persistently — it is only available in the rolling live display and is discarded after the session. If you need to download the day's data after sailing, contact support to enable server-side recording for your boat. When enabled, the streamed data can be downloaded at the end of the day as a log file.
For a permanent record with full analysis, upload your instrument's own log file at the end of the day as usual.
For programmatic access to the live data stream, see the Live Data API.