When muscle certificate of number registration paperwork be carried on board a vessel?

The muscle certificate of number registration paperwork should be carried on board a vessel at all times when the vessel is in operation. This documentation serves as proof of the vessel's registration and compliance with maritime regulations. It is essential for legal and safety reasons, as it may be required during inspections by authorities or in case of emergencies. Keeping this paperwork on board ensures that the vessel can be identified and operated within the legal framework.