*Question E1A05:
[97.5] Who must be in physical control of the station apparatus of an amateur station aboard any vessel or craft that is documented or registered in the United States?*  

*Correct Answer is  C: Any person holding an FCC issued amateur license or who is authorized for alien reciprocal operation*  

### AI Response: (may contain errors)  

To understand who must be in physical control of the station apparatus of an amateur station aboard a documented or registered vessel in the U.S., let's analyze the correct answer and the other options.

### Correct Answer: 
**C: Any person holding an FCC issued amateur license or who is authorized for alien reciprocal operation.**

- **Explanation**: The FCC regulations state that any person operating an amateur station must hold a valid amateur radio license. This includes U.S. citizens and foreign operators who are authorized under reciprocal agreements. Therefore, as long as the operator has a valid amateur license or is authorized for alien reciprocal operation, they can control the station apparatus.

### Why the Other Choices are Incorrect:

- **A: Only a person with an FCC Marine Radio license grant**  
  - **Explanation**: This option is incorrect because a Marine Radio license is not required for operating an amateur station. The amateur radio service has its own licensing requirements, and a Marine Radio license does not grant authority to operate an amateur station.

- **B: Only a person named in an amateur station license grant**  
  - **Explanation**: This option is misleading. While the person named in the license has specific privileges, the regulations allow any licensed amateur operator to control the station, not just those specifically named in the license grant.

- **D: Any person named in an amateur station license grant or a person holding an unrestricted Radiotelephone Operator Permit**  
  - **Explanation**: This option is incorrect because an unrestricted Radiotelephone Operator Permit is not sufficient for operating an amateur station. The operator must hold an amateur radio license, as the permit does not cover amateur radio operations.

### Summary:
- The key takeaway is that any person with a valid amateur radio license or authorized under reciprocal agreements can operate the station on a vessel. This ensures compliance with FCC regulations while allowing flexibility for licensed operators.

### Useful Rule of Thumb:
- Always check the specific licensing requirements for amateur radio operations, especially when operating from unique locations like vessels or foreign countries.