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If you measure an Azimuth of 358.5  degrees with a magnetic compass, and the Magnetic Declination of your location is 7.2 degrees West, what is the True Azimuth (report in numerical DD format, with no units)

Question

If you measure an Azimuth of 358.5  degrees with a magnetic compass, and the Magnetic Declination of your location is 7.2 degrees West, what is the True Azimuth (report in numerical DD format, with no units)

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Solution

To calculate the True Azimuth, you need to adjust the Magnetic Azimuth by the Magnetic Declination.

Here are the steps:

  1. Identify the Magnetic Azimuth: 358.5 degrees.
  2. Identify the Magnetic Declination: 7.2 degrees West.
  3. Because the Magnetic Declination is to the West, you need to add it to the Magnetic Azimuth. If it was to the East, you would subtract it.
  4. Add the Magnetic Azimuth and the Magnetic Declination: 358.5 degrees + 7.2 degrees = 365.7 degrees.
  5. However, a circle only has 360 degrees. So, if your result is greater than 360, you need to subtract 360 from it to get the True Azimuth.
  6. Subtract 360 from 365.7: 365.7 degrees - 360 degrees = 5.7 degrees.

So, the True Azimuth is 5.7 degrees.

This problem has been solved

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