*Question G2C03:
What does it mean when a CW operator sends “KN” at the end of a transmission?*  

*Correct Answer is  C: Listening only for a specific station or stations*  

### AI Response: (may contain errors)  

When a CW operator sends “KN” at the end of a transmission, it indicates that they are "Listening only for a specific station or stations." 

### Explanation of the Correct Answer:
- **Correct Answer: C - Listening only for a specific station or stations**
  - The “KN” signal is a request for stations to respond only if they are calling the operator who just transmitted. It tells other operators that the sender is specifically waiting for a response from a particular station, rather than inviting general calls.

### Explanation of Incorrect Answers:
- **A: No US stations should call**
  - This is incorrect because “KN” does not imply that US stations should refrain from calling. It simply indicates that the operator is waiting for a specific station.

- **B: Operating full break-in**
  - This is incorrect because “KN” does not indicate the mode of operation. Full break-in (or QSK) allows the operator to hear incoming signals while transmitting, but “KN” specifically refers to listening for a particular station.

- **D: Closing station now**
  - This is incorrect because “KN” does not mean the operator is closing the station. Instead, it indicates that the operator is still active and waiting for a specific response.

### Summary:
- **“KN”** is a CW shorthand that signals the operator is listening for a specific station, making it clear to others that they should only respond if they are that station. 

This understanding is crucial for effective communication in CW operations and helps maintain orderly exchanges on the air.