Which document must a ship carry when operating a VHF radio?

The requirement for a ship to carry an Operator's Certificate when operating a VHF radio is crucial for ensuring that the individuals operating the radio are adequately trained and qualified. The Operator's Certificate serves as proof that the operator has completed the necessary training and understands the protocols for using the VHF radio effectively. This is especially important for safety and communication purposes within maritime operations, as VHF radios are vital for navigation and contacting other vessels or authorities in case of emergencies.

While other documents, like the Ship's Registration Certificate or a Logbook of Operations, may be important for various regulatory and operational reasons, they do not specifically validate the training of the individual using the radio. Similarly, the Marine Safety Manual provides guidelines and safety protocols but does not serve as proof of an operator’s qualifications. Therefore, the Operator's Certificate is essential for complying with regulations governing the safe and effective use of VHF radio communication on board a vessel.