If you are flying a magnetic heading of 090° and your fixed card ADF reads 165°, what heading would your RMI point to?

If you are flying a magnetic heading of 090° and your fixed card ADF reads 165°, what heading would your RMI point to?

• A. 075
• B. 045
• C. 345
• D. 255

Answer: (D)

The bearing shown on the RMI is derived by relating your current magnetic heading to the bearing to the NDB shown on the ADF. In this setup, you combine the two values to get the direction the RMI would indicate you should head. With a magnetic heading of 090 and the ADF reading of 165, you add them: 090 + 165 = 255. So the RMI would point to 255 degrees. In practice, wind and the “to/from” configuration can affect actual flight path, but the instrument’s indication under these inputs reflects the sum of heading and the ADF bearing, giving 255.

The bearing shown on the RMI is derived by relating your current magnetic heading to the bearing to the NDB shown on the ADF. In this setup, you combine the two values to get the direction the RMI would indicate you should head. With a magnetic heading of 090 and the ADF reading of 165, you add them: 090 + 165 = 255. So the RMI would point to 255 degrees.

In practice, wind and the “to/from” configuration can affect actual flight path, but the instrument’s indication under these inputs reflects the sum of heading and the ADF bearing, giving 255.