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Questions and Answers
What is the formula for calculating True Wind Speed?
What is the formula for calculating True Wind Speed?
- TWS = √(OS² + AWS² + 2 × OS × AWS × cos(RWA))
- TWS = √(OS² - AWS² + 2 × OS × AWS × cos(RWA))
- TWS = √(OS² + AWS² - 2 × OS × AWS × cos(RWA)) (correct)
- TWS = AWS² - TWS² - OS² ÷ 2 × TWS × OS
What is the value of the True Wind Speed calculated in the text?
What is the value of the True Wind Speed calculated in the text?
- 11.6 knots (correct)
- 13.2 knots
- 9.8 knots
- 15.7 knots
What is the formula for calculating True Wind Direction?
What is the formula for calculating True Wind Direction?
- TWD = AWS² + TWS² - OS² ÷ 2 × TWS × OS
- TWD = √(AWS² - TWS² - OS² ÷ 2 × TWS × OS) (correct)
- TWD = AWS² - TWS² + OS² ÷ 2 × TWS × OS
- TWD = √(AWS² + TWS² - OS² ÷ 2 × TWS × OS)
What is the value of the Relative Wind Angle provided in the text?
What is the value of the Relative Wind Angle provided in the text?
What is the result of the inverse cosine function applied in the calculation of True Wind Direction?
What is the result of the inverse cosine function applied in the calculation of True Wind Direction?
After calculating True Wind Direction, what is the final direction obtained?
After calculating True Wind Direction, what is the final direction obtained?
What is the purpose of a barometer?
What is the purpose of a barometer?
Which wind speed is sometimes known as 'ground wind'?
Which wind speed is sometimes known as 'ground wind'?
What is the role of an anemometer?
What is the role of an anemometer?
Which instrument measures the speed of the wind felt by an observer?
Which instrument measures the speed of the wind felt by an observer?
What does True Wind Angle represent?
What does True Wind Angle represent?
What is the significance of nitrogen in the atmosphere?
What is the significance of nitrogen in the atmosphere?
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Study Notes
Calculating Wind Speed and Direction
- The formula for calculating True Wind Speed is not specified in the text.
- The value of the True Wind Speed calculated in the text is not provided.
Wind Direction Calculation
- The formula for calculating True Wind Direction is not specified in the text.
- The value of the Relative Wind Angle provided in the text is not specified.
- The result of the inverse cosine function applied in the calculation of True Wind Direction is not provided.
- After calculating True Wind Direction, the final direction obtained is not specified.
Atmospheric Instruments
- A barometer measures atmospheric pressure.
- Ground wind is another term for wind speed measured at the Earth's surface.
- An anemometer measures wind speed.
- An anemometer measures the speed of the wind felt by an observer.
Wind Angle and Atmospheric Composition
- True Wind Angle represents the direction of the wind in relation to the observer's direction of motion.
- Nitrogen is a significant component of the Earth's atmosphere, making up approximately 78% of the atmosphere.
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