Questions tagged [magnetic-compass]

A device used to determine one's direction with respect to the Earth's magnetic field.

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How does the runway number relates to Magnetic Heding/Course? [duplicate]

I know that runway numbers correspond to Magnetic North, how does it relate to Magnetic Course/heading? Can we say that the runway number is equivalent to Magnetic heading?
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Semi-circular rule for choosing a FL: Risk of head on collision with borderline headings (179, 359)?

If it happens that you fly a 179/359 heading in uncontrolled airspace, what's the risk of collision with aircraft flying in opposite direction?
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How would you use the mental clock code to solve this dead reckoning problem?

Can someone explain the question below in details? You plan to fly a cross country flight at 2 000 feet at a true airspeed of 120 knots. Your track is 270° (True) and the wind is from 225° (True) at ...
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Are magnetic turning errors due to the southern side of the compass being weighted?

When I was in college, I had an instructor who taught me that the turning errors in a magnetic compass were due to a counter-weight installed on the south side of the compass that was intended to ...
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Does the movement of the magnetic poles affect aviation?

Recently I read that Earth's magnetic pole moves quite significantly, several kilometers. Do these changes affect aviation, i.e. for pilots landing their airplanes?
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Why do we undershoot/overshoot with a compass turn?

In the southern hemisphere you would undershoot when turning towards a southerly heading and overshoot towards a northerly heading, and the opposite in the northern hemisphere. Why is this?
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Is this the correct sequence of steps to convert from true course to compass heading?

I wanted to confirm my understanding of VFR Flight Planning/Dead Reckoning with relation to heading and course calculation. Is the below correct? Using a plotter, draw a line from departure airport ...
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At what distance from magnetic north do pilots start referencing true north for heading?

The Earth's magnetic poles are constantly shifting, resulting in a significant distance between the true and magnetic poles. This means that while using them as references for heading at lower ...
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Do I use true or magnetic north in headwind component calculations? [duplicate]

For the landing performance calculations, I want to calculate the headwind component. I can do this with the runway heading and the reported wind direction and speed. But do I need to make any ...
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2answers
542 views

Is there any instrument similar to a compass but which I can electrically drive?

I would like to build a home weather station with analog instruments showing for example temperature, wind speed and wind direction. I would like to use a salvaged flight instrument to show the wind ...
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What is the most commonly occurring fault with this type of electrically driven gyro?

I have an examination tomorrow about advanced avionics systems (EASA module 13) and we are required to troubleshoot a fault with the compass system. What is the most commonly occurring fault with a ...
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Do modern aircraft still have mechanical sensors as backup to GPS?

A comment here Why does "no aircraft cross directly over the pole"? indicates that modern aircraft use GPS for navigational purposes, which makes perfect sense. However, do these aircraft ...
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How does ATC deal with apparent compass errors when giving vectors?

Pilots should strive to fly precisely, but we sometimes reach task saturation. When ATC gives a heading, receives the correct readback, but observes a 10- to 15-degree difference between the actual ...
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How do you calibrate the compass of an aircraft on a compass rose?

A follow-up from this question; one of the answers mentioned that the compass rose in the picture was used to calibrate an aircraft's compass. But how does that actually work? Do you park the ...