Which of the following logkeeping statements is true?

The correct answer encompasses multiple aspects of logkeeping requirements, specifically highlighting that certain entries are mandatory for compliance with maritime communication regulations.

In particular, maintaining records of pre-voyage, pre-departure, and daily tests is essential for ensuring that a station is operating correctly and safely. These entries not only serve as documentation of the vessel’s communication readiness but also help in tracking the history of the equipment's performance, which can be crucial in case of incidents.

Furthermore, the requirement to log a summary of all Distress communications heard and Urgency communications affecting the station’s own ship is critical. This helps ensure that all relevant communications are documented, which can be vital in emergencies and can provide a record for investigations if something goes wrong. Proper logging of these types of communications indicates adherence to protocols designed to protect not only the vessel but the safety of all navigators in the vicinity.

The combination of the need for comprehensive logging of these aspects ensures that vessels meet regulatory expectations and maintain a high standard of maritime safety and communication practices.