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SDSA Rally Fleet Tracking

Tracking vessels is central both to safety and camaraderie in our rallies. The fleet map is available on the web and in the SDSA app, with positions updating every 30 minutes during active rallies and hourly otherwise. The map typically goes live months before the rally departure and remains accessible for a year, making it easier for participants to find each other.

 

Data and Symbols–Both the App and web use the same data, though the web map offers additional features (shown below) that are not yet in the app. Each boat is shown with a symbol indicating its current status. Here’s what they mean:

  Checked in within 12 hours, no movement >1 nm

 Checked in within 12 hours, movement >1 nm in last 24 hours

 Checked in within 24 hours, but not in the last 12 hours

 No report in 24+ hours 

 Image black background indicates position received by AIS - near-shore rallies only

The gray line extending from a boat shows its predicted position based on the last reported position, speed and bearing.

 

Use the panel at the top of the map to switch between atlas and satellite views or to display tracks for all boats. Click Remove Tracks to clear them, or to set a custom start date with the date box (default is the start of the rally). When viewing all tracks, click any line on the map to open that boat’s info box When vessels reach their destination, they are marked Completed and removed from the map–but you can bring them back with Show Completed. 

Click on a boat to view more data and its reported track. 

 

  • Boat Name

  • Position (degrees & minutes)

  • Hours Since Last Report (measured from data collection, not current time)

  • Speed & Direction at last report

  • Length & Make of vessel

  • Destination (from rally data) and distance remaining to destination

  • Track Length in nautical miles (from track start date to present)

Selecting Hide Speed shows the boat’s track in yellow, beginning from the start date. The yellow track remains until a new boat is selected. Choosing Show Speed displays the track in varying colors to indicate speed, which also stays visible until a new boat is selected.

 

To locate a boat, use the selector below the map–it will center the view on your choice. 

Right-click on the map for coordinates (deg/min) or to measure distance. Selecting Measure Distance drops a movable, resizable circle with its radius shown in nautical miles. Right-click inside the circle to see all boats within that location. Click outside the circle or on the X to remove it.

 

Map data updates twice an hour (at :05 and :35). Refreshing won’t speed this up since the map automatically pulls in new position data every 10 minutes. Refreshing is rarely necessary. Tracks, however, do not auto-refresh. To update all tracks. Select Remove Tracks and then Show All Tracks. To refresh an individual track, click another boat, then return to the boat you want.

 

Overdue Vessels–If a vessel hasn’t reported in the last 12 hours, it is marked Overdue, showing the boat’s rally name and hours since the last report. If you see NO TRACK INFO, no track data exists and the boat will appear at latitude 0, longitude 0. 

Individual boats or groups of boats–Display just a single boat (or a custom group) by using a specific map URL. Add ?boatList=”boatname” to the end of the URL to show just that vessel on the map. For multiple boats, list names separated by commas. If a boat name contains a space, put the entire boat name in quotes (you can also quote the entire list).

Single boat: https://sdsatracking.com/fall2025/?boatList=Helia2

Multiple boats https://sdsatracking.com/fall2025/?boatList="Celebrate,Exuberant,Neverland,Sage,Sapphire,Sostratus,Temagami"

Adding &wind to the end of the URL to show vessel speed, and, when available, wind data along the track.

Questions? send a note to [email protected]