Which standard practice should be followed when maintaining a portable system?

When maintaining a portable system, inspecting connections for leaks and signs of wear is crucial to ensure the safety and functionality of the equipment. Proper connections are vital in any life support system, particularly in environments where divers operate. Leaks can lead to a failure of the system, potentially endangering the diver's life. Regular inspections help identify even minor wear or deterioration before it becomes a major issue, which enhances the overall reliability of the system during use.

In contrast, regularly replacing all hoses regardless of condition can lead to unnecessary expenses and may also overlook the important practice of assessing the actual state of the hoses. Using the system without any safety precautions ignores fundamental safety protocols that are essential for protecting divers. Additionally, only consulting the manual when there is a problem neglects the proactive approach needed for maintenance; it's important to familiarize oneself with the manual for regular inspections and understanding the proper operational procedures and maintenance requirements.