The Digital Selective Calling Operations Doctrine is published under which COMDTINST number?

The Digital Selective Calling Operations Doctrine is published under which COMDTINST number?

• A. COMDTINST 16121.1
• B. COMDTINST 16121.2
• C. COMDTINST 16120.9
• D. COMDTINST 16122.3

Answer: (A)

Understanding how Coast Guard directives are organized helps you locate the exact document for a topic. The 16xxx series covers telecommunications and related operations, and the numbers after that indicate the specific topic and its revision. Digital Selective Calling Operations Doctrine is published as COMDTINST 16121.1, the first official instruction in that topic area. The other numbers (16121.2, 16120.9, 16122.3) correspond to different topics or later amendments, so they don’t apply to the DSC doctrine. So the correct designation is COMDTINST 16121.1.

Understanding how Coast Guard directives are organized helps you locate the exact document for a topic. The 16xxx series covers telecommunications and related operations, and the numbers after that indicate the specific topic and its revision. Digital Selective Calling Operations Doctrine is published as COMDTINST 16121.1, the first official instruction in that topic area. The other numbers (16121.2, 16120.9, 16122.3) correspond to different topics or later amendments, so they don’t apply to the DSC doctrine. So the correct designation is COMDTINST 16121.1.