RRS Rule 33 and the Perfect Sound Signal for Mark Layers
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RRS Rule 33 and the Perfect Sound Signal for Mark Layers

When race officials need to change the course, RRS Rule 33 requires Flag C with repetitive sound signals. The Windie Signal Horn delivers a loud, distinct, and reliable tone—built from stainless steel, compact, and always ready. Equip your mark layer team with the perfect tool to ensure compliance and professional race management.

RRS Rule 33 and the Perfect Sound Signal for Mark Layers

In every regatta, clarity and precision are essential. When race officials or mark layers need to change the next leg of the course, competitors must instantly understand the new instructions. That’s why the Racing Rules of Sailing (RRS) Rule 33 sets clear requirements.

The Rule - RRS 33

According to the World Sailing Racing Rules of Sailing 2021–2024:

Rule 33 – Changing the Next Leg of the Course

“The signal shall be the display of flag C with repetitive sounds and may be accompanied by the compass bearing of the next leg, a green triangular flag or board for a change to starboard, or a red rectangular flag or board for a change to port.”

(Source: World Sailing, Racing Rules of Sailing 2021–2024, Rule 33)

Why Sound Matters in Rule 33

Wind and waves can drown out a weak signal. A whistle can be missed, and electronic devices may fail at the critical moment. To keep races fair and professional, you need a tool designed for instant recognition, durability, and reliability. Race officials can find the full range of sound signals and safety gear in one place.

For the full picture of sound signals, safety and the rules at sea, read our handheld fog horn guide.

The Windie Signal Horn - Built for Race Officials

The Windie Stainless Steel Handheld Fog Horn is engineered with the needs of race officers and mark layers in mind:

  • 🔊 Loud, Clear Sound – Carries across water, wind, and engine noise.

  • 🎶 Distinct Tone – Different from any standard whistle, or even our Super Loud Whistle, ensure competitors know it’s an official signal.

  • ⚓ Marine-Grade Durability – Stainless steel construction resists corrosion and guarantees long-lasting use.

  • ✋ Compact & Lightweight – Easy one-hand operation, leaving the other hand free to hold Flag C.

  • 🔋 Always Ready – No batteries, no charging – 100% reliable.

Professional Signals, Seamless Racing

Equipping your mark layer team with the Windie Signal Horn ensures your regatta runs according to the rules, with signals that are:

✔️ Compliant with RRS Rule 33
✔️ Instantly recognizable by competitors
✔️ Trusted by race officials worldwide

👉 With Windie gear, you don’t just meet the rules - you exceed expectations.

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