What characteristic should suitable deep dive gear have?

Deep dive gear must be in good working order to ensure the safety and effectiveness of a dive. When diving at greater depths, the pressure and environmental conditions can affect both the diver and the equipment. Equipment that is not functioning properly can lead to serious complications, such as equipment failure or decreased safety margins in challenging situations.

Having gear in good working order means that all components, including regulators, tanks, and buoyancy control devices, have been serviced and are functioning as expected before the dive. This level of preparedness is essential for both the diver's safety and the success of the dive, particularly in deeper, more challenging environments where equipment reliability is critical.

While other characteristics such as having backup equipment and visibility features can be beneficial for divers, the foremost priority is ensuring that the primary gear is completely functional and reliable for the dive ahead.