Final answer:
Pleasure craft over 9 metres in length must have an onboard sounding device as per safety regulations. This device is crucial for communication and preventing collisions in conditions of poor visibility.
Step-by-step explanation:
Pleasure craft over 9 metres (29.5 feet) in length must have an onboard sounding device. This regulation is to ensure that vessels can communicate effectively in situations where visibility is reduced, such as in fog or heavy rain. The sounding device, which could be a horn or a whistle, is essential for the prevention of collisions and is a requirement as per the boating safety regulations.
It is crucial for operators of such pleasure craft to be familiar with the appropriate regulations pertaining to safety equipment. Not only must they ensure that the correct sounding device is available on board, but they should also be knowledgeable about how and when to use it. Compliance with these rules is important for the safety of all waterway users.