What is meant by the term "ITU channel"?

Correct Answer: Option B — This refers to an internationally standardized assignment of frequency pairings for common use.

ITU channels represent internationally standardized frequency pairings established to ensure global interoperability. These assignments allow maritime stations to communicate reliably across different regions by using pre-coordinated frequencies, preventing interference and ensuring that all GMDSS-equipped vessels operate on common, recognized channels for safety and commercial traffic.