Magnetic Bearings and Declination Concepts

This video tutorial explains how to calculate magnetic bearings by first understanding magnetic declination. It covers the Earth's magnetic field, its variations over time and location, and the steps to calculate magnetic declination. An example is provided to illustrate the calculation process, followed by instructions on how to use this information to determine magnetic bearings.

Why is it important to understand magnetic declination when calculating magnetic bearing?

• It is necessary for adjusting compass readings.

• It allows for accurate weather predictions.

• It is used to measure altitude.

• It helps in determining the true north.

What is the main difference between magnetic north and true north?

• Both are fixed and do not change.

• Both change over time.

• True north is fixed, while magnetic north changes.

• Magnetic north is fixed, while true north changes.

Which of the following is NOT needed to calculate magnetic declination?

• Direction of variation

• Mean magnetic declination

• Mean annual temperature

• Year of calculation

What information is typically found at the bottom of a map to help calculate magnetic declination?

• Altitude levels

• Mean magnetic declination

• Magnetic field strength

• Weather patterns

In the example problem, what is the mean magnetic declination given for the year 2008?

• 14 degrees 35 minutes

• 15 degrees 50 minutes

• 12 degrees 30 minutes

• 13 degrees 45 minutes

How do you adjust the magnetic declination when it is towards the west?

• Divide by the mean declination

• Multiply by the mean declination

• Add to the mean declination

• Subtract from the mean declination

What is the correct magnetic declination for the year 2018 in the example problem?

• 14 degrees 35 minutes

• 13 degrees 95 minutes

• 15 degrees 45 minutes

• 12 degrees 50 minutes

How do you calculate a magnetic bearing if you know the normal bearing and magnetic declination?

• Add the magnetic declination to the normal bearing

• Divide the normal bearing by the magnetic declination

• Multiply the normal bearing by the magnetic declination

• Subtract the magnetic declination from the normal bearing

If the normal bearing is 195 degrees and the magnetic declination is 14 degrees 35 minutes, what is the magnetic bearing?

• 195 degrees 0 minutes

• 109 degrees 35 minutes

• 180 degrees 25 minutes

• 209 degrees 35 minutes

What should you do if you don't understand how to calculate a bearing?

• Use a different map

• Guess the bearing

• Ignore the calculation

• Watch a tutorial video