Replace it with a maintenance-free system that turns GPS speed into a signal your instruments understand: a modern alternative to your boat’s paddle-wheel log.
✔ Maintenance-free
✔ Easy installation
✔ Compatible
The problem with traditional speed logs
If your boat has a paddle-wheel log, you know that sooner or later it stops working properly.
Marine growth, dirt and wear cause:
- “Wrong readings”
- “Intermittent failures”
- “Constant maintenance”
And the worst part:
even after cleaning it… it fails again.
A lasting solution (no moving parts)
Our system completely replaces the traditional speed log with a fully digital alternative.
It takes GPS speed data and converts it into a pulse signal your instruments can read.
No fouling. No maintenance. No mechanical failures.
Why switch to this system
- No marine growth, no dirt
- Zero maintenance
- Easy installation
- Works with your existing instruments
- Greater reliability
- Consistent accuracy
How it works
- Step 1: The GPS gets the boat's real speed.
- Step 2: The device processes the data.
- Step 3: It generates a pulse signal, just like a speed log.
- Step 4: Your instruments display the speed as usual.
Comparison
| Feature | Traditional speed log | GPS system |
| Maintenance | High | None |
| Failures | Frequent | No |
| Accuracy | Variable | High |
| Installation | Complex | Simple |
Not sure which one to choose? We'll help you find the sailoQ that fits your instruments.
Stop wasting time on your speed log
Ask for information with no obligation and discover how to modernise your boat. It's quick and easy, an alternative to your boat's speed log.
Practical guides
How to install and calibrate your sailoQ on a Raymarine ST40 or ST60
Three wires and a quick check: step by step to get it working.
Why does the speed log fail?
Fouling, dirt and wear: why paddlewheel logs end up failing and what alternatives you have.
GPS speed log or paddlewheel log
What each one measures and how to read the speed you see on the display.
How to clean your boat's speed log
Step by step to remove and clean the paddlewheel with the boat in the water, and how often to do it.
FAQ
Does it work with my instruments?
Yes, it is designed to replace the speed log signal.
Is it hard to install?
No, installation is simple.
Do I lose accuracy?
No, in many cases it improves.
Can I work out the current with sailoQ?
No. sailoQ shows GPS speed, which is over the ground, so you cannot compare it with the log's speed to calculate the current. In return you forget about the paddlewheel and the maintenance. We explain it in Current with you or against you.