Why Windward Marks Are Port Rounding
If you’ve just started racing dinghies, you may have noticed something curious: almost every course has the boats rounding the windward mark to port — in other words, turning left around the buoy.
But why? Is it tradition? Safety? Speed? Or just another sailing quirk designed to confuse newcomers?
Let’s break it down.
What Does “Port Rounding” Mean?
A port rounding means the mark is passed on the port (left) side of the boat, with the boat turning to the left around it.
The opposite is a starboard rounding, which requires a right-hand turn around the mark.
So Why Is Port Preferred?
1. Standardisation
Most racing events follow the same convention so sailors know what to expect. Port roundings are the default in the Racing Rules of Sailing and most race documents unless stated otherwise.
2. Right of Way at the Mark
Port roundings generally favour boats on starboard tack — the tack that has right of way.
This simplifies decision-making at the mark and reduces protests or collisions. It keeps boats flowing more smoothly.
3. Cleaner Approaches
On a port rounding, the layline (the imaginary line you must sail to reach the mark without another tack) is longer and gives boats more time to sort out overlaps and rights.
4. Safety
When boats converge at a mark from different directions, it’s easier and safer to manage approaches on starboard with port rounding.
Fewer last-minute tacks. Less confusion. Less shouting.
What If the Course Says “Starboard Rounding”?
That’s usually only for specific types of races — or if the course has been set up in reverse due to wind direction or venue constraints. It’s rarer, and it requires a different mindset — and sharp eyes at the briefing.
Learn the Pattern, But Read the Course
Don’t just assume every race will use port rounding — check the sailing instructions and the course board. But 9 times out of 10, if you’re heading to a windward mark, you’ll be turning left around it.
📖 Learn more racing tips at: https://pmrsailing.uk
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