*Question G2D11:
Why are signal reports typically exchanged at the beginning of an HF contact?*  

*Correct Answer is  A: To allow each station to operate according to conditions*  

### AI Response: (may contain errors)  

The correct answer to why signal reports are typically exchanged at the beginning of an HF contact is:

**A: To allow each station to operate according to conditions.**

### Explanation of the Correct Answer:
- **Operating Conditions**: Signal reports provide information about the quality of the received signal, including strength and clarity. This helps each operator understand the current propagation conditions and adjust their equipment or operating techniques accordingly. For example, if one station reports a weak signal, the other may increase their power or adjust their antenna.

### Why the Other Choices are Incorrect:
- **B: To be sure the contact will count for award programs**: While signal reports can be important for awards, this is not the primary reason for exchanging them at the start of a contact. The focus is more on operational adjustments rather than awards.
  
- **C: To follow standard radiogram structure**: Although there are standard practices in amateur radio communication, the exchange of signal reports is not strictly a part of a radiogram structure. Radiograms are more formal messages, while signal reports are informal checks on communication quality.

- **D: To allow each station to calibrate their frequency display**: Signal reports do not help in calibrating frequency displays. Frequency calibration is typically done using known standards or beacons, not through signal reports.

### Useful Rules of Thumb:
- **Signal Reports**: Commonly given in the format of "5-9" (e.g., "You are 5-9" means the signal is strong and clear). The first number indicates signal strength (1-5 scale), and the second number indicates readability (1-9 scale).
  
- **Propagation Awareness**: Always be aware of changing conditions on HF bands, as they can affect communication quality. Regularly exchanging signal reports helps maintain effective communication.

By understanding the purpose of signal reports, you can enhance your operating skills and ensure better communication during HF contacts.