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Questions and Answers

What is the ETA at Z if TAS = 120 kts?

1325 UTC

Given the following: True Track: 192 DEG. Magnetic variation: 7 DEGE. Drift angle: 5 DEG left. What is the magnetic heading required to maintain the given track?

190 DEG M

Given the following Magnetic heading: 060 DEG. Magnetic variation: 8 DEG W. Drift angle: 4 DEG right. What is the true track?

058 DEG

An aircraft following a true track of 048 DEG at a constant TAS of 210 kt. The wind velocity is 350 DEG/30 kt. The GS and drift angle area?

<p>196 kt, 7.5 DEG right</p> Signup and view all the answers

Given: FL 350. Mach 0.80. OAT -55 DEG C. Calculate the values for TAS and local speed of sound (LSS)?

<p>460 kt, LSS 567 kt</p> Signup and view all the answers

Fuel flow per HR is 22 US-GAL, total fuel on board is 83 IMP GAL, What is the endurance?

<p>3 hr 46 min</p> Signup and view all the answers

Flashcards

Magnetic Variation

The angle between True North and Magnetic North.

Agonic Line

A line drawn on a chart connecting points with zero magnetic variation.

Dip

The angle between the horizontal and the direction of the Earth's magnetic field at a given location.

Deviation

The angle between Magnetic North and Compass North, caused by local magnetic influences.

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Direct Reading Magnetic Compass

A compass that directly indicates magnetic heading.

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Compass Over-reading

An increase in compass reading when turning right (starboard) in the Northern Hemisphere.

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Acceleration Error

An error in compass reading caused by the acceleration of the aircraft.

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Aperiodic Suspension

A type of compass suspension designed to reduce oscillation.

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Isogonals

The lines on a chart showing points with the same magnetic variation.

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Magnetic Field Strength

The strength of the Earth's magnetic field decreases as you move further from the poles.

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Compass Error During Eastbound Acceleration in Northern Hemisphere

The magnetic compass card will turn anti-clockwise, giving an apparent turn toward the south.

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Compass Error During Westbound Acceleration in Northern Hemisphere

The compass card will turn clockwise, giving an apparent turn toward the north.

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Aclinic Line

A line drawn on a chart connecting points with zero dip.

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Compass Error During Right Turn in Southern Hemisphere

In the Southern Hemisphere, the compass will over-indicate the turn, and liquid swirl will decrease the effect.

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Compass Error During Right Turn in Northern Hemisphere

The compass will over-read, and the effect is increased by the liquid swirl.

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Conversion of True Course to Compass Heading

A method used to convert true course to compass heading by accounting for magnetic variation and deviation.

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Deviation Error

A compass error caused by the effects of nearby magnetic objects.

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Magnetic Field Strength at Altitude

The Earth's magnetic field is weaker at higher altitudes.

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Magnetic Field Strength and Magnetic Poles

The magnetic field is weaker further away from the magnetic poles.

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Compass Sensitivity

The sensitivity of a direct reading magnetic compass is inversely proportional to the horizontal component of the Earth's magnetic field.

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Change in Magnetic Variation Over Time

The change in magnetic variation over time is primarily due to the movement of the Earth's magnetic poles.

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Variation is West

True North is West of Magnetic North.

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Convergence of Isogonals

Isogonals converge at the North and South magnetic poles.

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Maximum Dip

The maximum dip angle is 90 degrees, occurring at the magnetic poles.

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Aperiodic Compass

The direct reading magnetic compass is made aperiodic using damping wires and by positioning the magnetic assembly mass close to the compass point.

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Compass Error During Left Turn in Northern Hemisphere

The compass will under-indicate the turn, and the effect is decreased by the liquid swirl.

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Compass Error During Left Turn in Southern Hemisphere

The compass will under-indicate the turn, and the effect is increased by the liquid swirl.

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