All compulsory equipped cargo ships while being navigated shall keep a continuous radiotelephone watch on which frequency?

The correct answer involves the requirement for cargo ships to maintain a continuous radiotelephone watch on both 2182 kHz and VHF Channel 16, also known as Ch-16. This requirement is essential for maritime safety as it ensures that vessels are able to communicate effectively during emergencies and coordinate with other ships and rescue services.

2182 kHz is recognized internationally as the radiotelephone distress frequency for maritime communication, primarily used for long-range communication, while Ch-16 serves a similar purpose but is used for VHF communications, allowing for short-range interactions. The combination of these two frequencies enables ships to be reachable in various situations, which enhances overall maritime safety.

Keeping a watch on both frequencies ensures compliance with international maritime regulations and enhances the likelihood of receiving urgent messages or assistance. The notion that cargo ships might be exempt from radio watch regulations is incorrect; all compulsory equipped vessels are required to follow these protocols to protect the safety of vessels at sea and the crew on board.