Download
Get SailTac on the boat computer
The installer is free and complete — there's nothing to set up first. A license key unlocks it, and the 30-day trial key costs nothing either.
Windows x64
~78 MB · v1.4.5
Apple silicon & Intel
~176 MB · v1.4.4
The macOS build is signed and notarized by Apple — it opens without a warning.
Windows will warn you the first time. What to click →
The installer is code-signed, but Windows SmartScreen and some antivirus tools build trust in a publisher from download volume rather than from the certificate. A new publisher gets flagged as something they haven't seen before — not as anything found inside it.
If your browser won't keep it: press Ctrl + J, click the … beside the blocked download, then Keep.
On “Windows protected your PC”: click More info, then Run anyway.
If antivirus quarantines it: check the SHA-256 below matches your download, then restore it. Please don't disable your antivirus to install this.
These steps are in your key email too, so you don't need this page open at the dock.
What you need
- Windows 10 and up on the boat — a laptop, a mini PC or a tablet running full Windows — or macOS 11 and up · Apple silicon and Intel.
- NMEA 0183 instrument data over the network, from a gateway such as a Yacht Devices or Actisense unit. NMEA 2000 works through a gateway too.
- A Wi-Fi network aboard if you want crew devices to see the displays.
- Internet at the dock, to fetch weather and cache charts. None needed once you cast off.
What the installer does
- Installs for all users, with Desktop and Start Menu shortcuts.
- Bundles everything it needs — no runtime, framework or database to install first.
- Opens TCP port 3001 in the firewall so crew devices on the boat Wi-Fi can connect. On Windows the installer does it; on a Mac, macOS asks the first time you start it — say yes.
- Keeps your data in your own Windows profile, and registers a normal uninstaller.
What it doesn't do
- No account to create, and no cloud service to depend on.
- Your race logs, polars and crew data stay on your own machine.
- No connection needed while racing — it only reaches the internet when you ask it to fetch weather or charts.
SHA-256 · SailTac-Setup-1.4.5.exe
ca485f730c923c8a59061e0f1c81c15a66de18ef7cb2e6a9f2e36782d607212b
SHA-256 · SailTac-1.4.4-universal.dmg
b2e7bbbd04e8ff7d8d7daba1f39ae3d63e161817862231666de44e386ad445cc
First run
From download to displays in about ten minutes
Do this at the dock, on shore power, with internet — not five minutes before the gun.
- 1
Run the installer
Double-click the downloaded file and follow the prompts. It asks for administrator permission because it installs for the whole machine and opens the port your crew's devices connect on.
- 2
Start SailTac from the Start Menu, or Applications on a Mac
Open it from the Start Menu or Desktop shortcut. The first run creates the folder where your polar, sails, crew and races will live. You can close it again straight away.
- 3
Enter your license key
Paste the key from your email. It only needs entering once, on any device — it unlocks SailTac for every device on the boat.
- 4
Connect your instruments
In Settings, add your NMEA 0183 source — the IP address and port of your gateway. The configuration is saved, so it reconnects by itself after a reboot. On a Mac, macOS asks for Local Network permission the first time: tap Allow, or no instrument data can reach the app.
- 5
Bring the crew on
On any phone or tablet on the boat's Wi-Fi, open http://<boat-computer-ip>:3001. That's it — no app store, nothing to install.
If crew devices can't connect
The installer opens the port for you, but some setups need it done by hand. On the boat computer, open PowerShell as administrator and run:
netsh advfirewall firewall add rule name="SailTac" dir=in action=allow protocol=TCP localport=3001Then open http://<boat-computer-ip>:3001 on any device on the boat's Wi-Fi. More in the setup guide.
Need a key?
The installer is free; the key is what turns it on. Trials are instant and don't need a card.