Refer to figure.
We are required to determine the True bearing to the NDB. Typically, an RMI shows Magnetic Heading and Bearings. However, based on the information provided in the question (RMI Deviation), we can infer that the RMI readings will be relative to Compass North.

Given that the ADF is tuned to an NDB, the ADF needle on the RMI works as follows:

• The Tip of the ADF needle indicates the Compass bearing to the NDB (300°).
• The Tail of the ADF needle indicates the Compass bearing from the NDB (120°).

In this case, we assume that the RMI is subjected to electromagnetic interference and therefore, deviation is applied: -2ºW (westerly deviation) ⇒ Compass North is 2° West of Magnetic North.

Let’s start by converting compass heading to magnetic heading:

• Magnetic Bearing to the NDB = Compass Bearing to the NDB - 002° = 300° - 002° = 298°

Since the question asks for true bearing, we need to correct for magnetic variation:

Remember that for NDB/ADF bearings the bearings are taken at the aircraft, therefore the magnetic variation applicable at the aircraft's position is to be used:

• Variation at the DR position = 22° West ⇒ Magnetic North is 22° West of True North
• True Bearing to the NDB = Magnetic Bearing to the NDB - 022° = 298° - 022° = 276°