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(Refer to FAA-CT-8080-2H, Figure 17.) What wind is forecast for STL at 12,000 feet?

FAA Figure 17Winds and temperatures aloft forecast (FB)FAA-CT-8080-2H · Sport, Recreational, Private & Remote Pilot supplement
How to read it: Each group is DDSSTT: direction (tens of degrees true), speed in knots, temperature in °C (negative above 24,000 ft). 9900 = light and variable. 7312-? means direction 230, speed 112 kt.
A

230° true at 56 knots.

B

230° true at 39 knots.✓ Correct Answer

C

230° magnetic at 56 knots.

Explanation

In Figure 17 the STL entry under 12,000 feet is 2339-04: 23 = 230 degrees, 39 = 39 knots, and -04 = minus 4 degrees Celsius. Winds and temperatures aloft forecasts give direction relative to true north, so the forecast is 230 degrees true at 39 knots. 56 knots is the 18,000-foot value (2356-16), and the direction is not magnetic.

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