What must GMDSS Radio Logs contain according to federal regulations?

GMDSS Radio Logs are critical for documenting communications involving safety and emergencies related to maritime operations. According to federal regulations, it is essential for these logs to include entries for all distress and urgency communications affecting the ship. This requirement ensures that there is a comprehensive record of any incidents that could impact the vessel's safety, as well as the actions taken in response to those communications.

Including all distress and urgency communications allows for proper assessment and analysis of incidents, which is vital for improving maritime safety practices. Furthermore, such logs facilitate accountability and provide crucial information that may be needed during investigations or audits after an incident, helping to enhance overall safety standards in maritime operations.

The other options suggest specific formats, retention periods, or limitations that don’t encompass the comprehensive requirements set forth by federal regulations, which emphasize the importance of complete documentation of all distress communications, not just those made in a specific manner or limited timeframe.