*Question G2D03:
What procedure may be used by Volunteer Monitors to localize a station whose continuous carrier is holding a repeater on in their area?*  

*Correct Answer is  B: Compare beam headings on the repeater input from their home locations with that of other Volunteer Monitors*  

### AI Response: (may contain errors)  

To localize a station whose continuous carrier is holding a repeater on, Volunteer Monitors can use direction-finding techniques. Here's why the correct answer is correct and why the others are not:

1. **Correct Answer: B - Compare beam headings on the repeater input from their home locations with that of other Volunteer Monitors**

   - **Explanation**: By using directional antennas, Volunteer Monitors can determine the direction (or beam heading) from which the signal is strongest. When multiple monitors compare their beam headings, they can triangulate the position of the interfering station. This method is effective because it uses the input frequency of the repeater, which is the frequency the interfering station is transmitting on.

2. **Why Other Choices Are Incorrect**:

   - **Choice A: Compare vertical and horizontal signal strengths on the input frequency**
     - **Explanation**: While comparing signal strengths can provide some information, it does not give a clear direction or location. Vertical and horizontal signal strengths are more about polarization and do not help in pinpointing a location.

   - **Choice C: Compare signal strengths between the input and output of the repeater**
     - **Explanation**: Comparing signal strengths between the input and output of the repeater does not help localize the source. The output signal strength is determined by the repeater's transmitter, not the interfering station.

   - **Choice D: All these choices are correct**
     - **Explanation**: Since choices A and C are not effective methods for localizing the station, this option is incorrect.

**Key Point**: Triangulation using beam headings is a proven method for locating a signal source, especially when multiple monitors are involved. This technique leverages the directional capabilities of antennas to find the intersection point of the strongest signals.