Add your race data

1. Easiest — your phone (live)

No gear needed — one quick sign-in, so your track’s credited to you and stays yours. Then open Track My Race, type your boat name, hit Start at the gun and Finish at the line — it records your GPS track and submits it to the fleet automatically (and shows you live on the map while you sail).

Open Track My Race →

2. Upload a track file (GPX or NMEA)

Got a track off a plotter, watch, tracker or app? Drop a .gpx or raw .nmea/.log file here — we auto-detect the format and it goes straight into the replay.
Using RaceQs? Export your track as a GPX (it’s yours) and drop it in — easy.

Add to which race?

Pick an existing race to drop this boat in alongside the fleet, or leave as new.

Start gun (optional)

Set the 5-minute gun and everything before it (delivery, milling about pre-start) is trimmed — the replay starts clean. Picking a race fills this from its start automatically.

Drop a .gpx or .nmea file here, or click to choose

2b. Pull your race from a tracker (Yellowbrick / PredictWind)

Raced with a Yellowbrick tracker or on a PredictWind club event? Enter the race code, find your boat, and we’ll pull just your own track (plus your corrected-time result) into a private replay. It’s your boat’s data — only you and people you allow can see it.

Tracker

Race code

Yellowbrick: the bit after yb.tl/ in the tracker link (e.g. rni2014).

3. Where to get a GPX from your gear

A GPX is the universal “track” file — almost everything can export one. Here’s how, by device:

Device / app	How to get the GPX
PredictWind DataHub	Logs GPS + NMEA 2000 to its SD card. In the DataHub web UI: Services → Tracking → Logs, then Export GPX (email it to yourself). Also plays back the full N2K log.
Chartplotter / MFD B&G, Simrad, Garmin, Raymarine, Furuno	Record a track during the race, then Export / Save track to SD card as GPX (or User Data / .gpx). Pop the card in a laptop and upload the file.
OpenCPN / Signal K	Right-click the track → Export as GPX (OpenCPN). Signal K can log and export tracks too.
Dedicated trackers Vakaros Atlas, Velocitek, Sailmon	Export the session/track from the companion app — GPX where offered (otherwise CSV; send it and we’ll convert).
Sailing apps RaceQs, Sailmon, PredictWind app	Export or share the race track as GPX from the app’s history/session view.
GPS watch Garmin, Suunto, Apple Watch	Export the activity as GPX (Garmin Connect → activity → Export GPX; similar in others).

Raw NMEA (0183 / N2K) logs? We’re building direct NMEA import. For now, convert to GPX first (OpenCPN opens most logs and exports GPX; the DataHub exports GPX directly), then upload above.

4. Run a receiver — put your patch of water on the map

Everything above is your race. This one is different: an AIS receiver picks up every boat in range, all the time, whether or not anyone remembered to press record. It just adds the water your antenna reaches and ours can’t — every feed closes another gap.

What you need	Notes
An RTL-SDR dongle google 'RTL-SDR dongle'	The common blue/silver USB stick (RTL2832U chipset). Any of them work.
A VHF antenna google 'marine VHF antenna'	Higher is better — AIS is line-of-sight. A roof or a mast beats a windowsill by miles.
Something to plug it into	A Raspberry Pi, an old laptop, anything that stays on. It wants to run continuously, so a machine that sleeps or travels makes a poor station.
AIS-catcher	Free and open source. Windows, Linux and Pi builds. On Windows the dongle also needs its driver swapped to WinUSB using Zadig — a one-off, five minutes.

Then you point it at us with one line. Ask for a station key and we’ll send the exact command with your key already in it:

AIS-catcher -v 15 -X off -H https://telltaleracing.com/api/ais-ingest?key=YOUR_KEY INTERVAL 10

Two things worth knowing, both learned setting up our own station.
· -X off stops AIS-catcher also sending your feed to the aiscatcher.org community hub, which it does by default. Sharing there is a perfectly good thing to do — we just think it should be your decision rather than a default you didn’t notice. Drop the switch if you want to share.
· On Windows, HTTPS may fail with “certificate verify failed”. That isn’t your setup or our server — AIS-catcher’s bundled SSL has no certificate store on Windows. Download cacert.pem next to the exe and set SSL_CERT_FILE to it. On Linux, if pushes fail with certificate verify failed, set SSL_CERT_FILE=/etc/ssl/certs/ca-certificates.crt (Debian/Raspberry Pi OS) rather than turning verification off.

What you get back. Your station is named as the source of every fix it contributes, and you can see its coverage and uptime. What we don’t do: your receiver’s feed stays yours — we only ever re-serve what your own antenna heard, never a paid aggregator’s data dressed up as ours. You can stop at any time and the key is revoked on the spot.

Ask for a station key →

Your data is yours — GPX is an open format, and you can always export everything and leave. Nothing here is locked in.