🔍 Key Concepts

• Pilot chart wind rose structure and symbology • Difference between frequency of observations and wind strength • How calms and wind force are shown elsewhere on the wind rose

💭 Think About

• On a pilot chart wind rose, which element is used to show how many times conditions were recorded in that area? • How are calm conditions usually shown—by a central numeral, by a percentage figure, or in some other way? • If the center numeral showed wind force, would that leave any place on the diagram to show how often each wind direction occurred?

✅ Before You Answer

• Identify what the barbs or lines around the circle represent (direction and frequency). • Check where the percentage of calms is normally printed in relation to the circle, not inside it. • Confirm which symbol on the wind rose is used to show the total sample size for that location (how many observations were made).