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Weather servicesQuestion 379 of 934

In a winds aloft forecast, the wind speed is above 99 knots but under 199 knots. How is it coded?

  1. The computer subtracts 50 from the direction and adds 100 to the speed
  2. The speed is coded as 99 knots
  3. The computer adds 100 to the direction
  4. The computer adds 50 to the direction and subtracts 100 from the speed
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Correct answer: The computer adds 50 to the direction and subtracts 100 from the speed

A group of 8115 decodes as 310° at 115 knots.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 13: Aviation Weather Services — Winds and Temperature Aloft Forecast, page 323

Practice weather services

Questions last reviewed: 18 October 2026