If you race dinghies in the UK — from puddle to open water — this matters. The Royal Yachting Association has officially released the Portsmouth Yardstick (PY) Numbers for 2026, and clubs across the country are already updating their results sheets. For most grassroots sailors, Portsmouth Yardstick isn’t theory. It’s the quiet system working behind every corrected result on a Sunday afternoon. It allows Lasers, Wayfarers, RS boats, Solos and everything in between to line up together and still produce meaningful racing.