COMDTINST 16121.1 documents the Digital Selective Calling Operations Doctrine. Which topic does it cover?

COMDTINST 16121.1 documents the Digital Selective Calling Operations Doctrine. Which topic does it cover?

• A. Digital Selective Calling Operations Doctrine
• B. International Code of Signals
• C. SITOR Teletypewriter operations
• D. Global Maritime Distress and Safety System

Answer: (A)

The main idea is recognizing that COMDTINST 16121.1 specifically documents the Digital Selective Calling Operations Doctrine. That means the topic it covers is Digital Selective Calling Operations Doctrine itself—the procedures, standards, and roles involved in using DSC for maritime communications, including how calls are originated, received, and processed, and how distress or safety alerts are managed within the DSC framework. DSC is the digital method used to alert and establish contact with ships and stations, reducing voice traffic and enabling rapid, automated call setup. While DSC is a component of the broader Global Maritime Distress and Safety System, this document focuses on the DSC operations doctrine rather than the wider system, the International Code of Signals, or SITOR teletypewriter operations.

The main idea is recognizing that COMDTINST 16121.1 specifically documents the Digital Selective Calling Operations Doctrine. That means the topic it covers is Digital Selective Calling Operations Doctrine itself—the procedures, standards, and roles involved in using DSC for maritime communications, including how calls are originated, received, and processed, and how distress or safety alerts are managed within the DSC framework. DSC is the digital method used to alert and establish contact with ships and stations, reducing voice traffic and enabling rapid, automated call setup. While DSC is a component of the broader Global Maritime Distress and Safety System, this document focuses on the DSC operations doctrine rather than the wider system, the International Code of Signals, or SITOR teletypewriter operations.