What source provides updates on changes or additions to routine communications frequencies of a Commercial Radio Station?

The correct answer is based on the specific regulations and guidance provided within the FCC Part 80, Subpart W, which deals with Coast Radio Stations. This part of the regulation outlines the responsibilities and requirements of coast radio stations, including the duty to maintain an updated listing of routine communications frequencies. These updates are crucial for ensuring the accurate and efficient transmission of maritime communications.

By adhering to the guidelines set forth in this regulation, coast radio stations can provide reliable communication services that are vital for safety, navigation, and operational efficiency at sea. The information found in this resource reflects the most current practices and changes pertinent to maritime communication, making it the go-to source for updates regarding routine communications frequencies.

While other options may relate to maritime communications or other regulatory aspects, they do not specifically focus on the updates regarding routine communications frequencies in the same direct manner as the FCC Part 80 regulations do.