*Question E1A10:
[97.11] If an amateur station is installed aboard a ship or aircraft, what condition must be met before the station is operated?*  

*Correct Answer is  A: Its operation must be approved by the master of the ship or the pilot in command of the aircraft*  

### AI Response: (may contain errors)  

When an amateur station is installed aboard a ship or aircraft, the primary concern is ensuring that its operation does not interfere with the safety and operation of the vessel. Therefore, the correct answer is:

**A: Its operation must be approved by the master of the ship or the pilot in command of the aircraft**

### Explanation:

1. **Correct Answer:**
   - **Approval by the Master or Pilot:** The master of the ship or the pilot in command of the aircraft is responsible for the safety and operation of the vessel. They must approve the operation of any amateur radio equipment to ensure it does not interfere with the vessel's communication systems or safety operations.

2. **Incorrect Choices:**
   - **B: Agreement not to transmit when the main radio is in use:** While it is important to avoid interference with the main communication systems, simply agreeing not to transmit is not sufficient. The master or pilot must have the authority to approve or deny operation.
   - **C: Independent power supply:** Having an independent power supply is not a requirement. The concern is more about operational safety and interference, not the source of power.
   - **D: Operation in specific bands:** There is no requirement to limit operation to specific segments of the amateur bands. The key requirement is obtaining approval from the master or pilot.

### Key Rule:
- **FCC Rule [97.11]:** This rule emphasizes the need for approval from the person in charge of the vessel, ensuring that amateur radio operations do not compromise the safety and communication systems of the ship or aircraft.