Why is the safety drill conducted at the start of every dive?

The safety drill conducted at the start of every dive primarily serves to verify that the gas delivery systems are functioning properly. This is a vital aspect of dive safety, as ensuring that tanks, regulators, and other gas supply equipment are in good working order can prevent potentially life-threatening situations underwater. Checking the gas delivery systems helps divers confirm they have the necessary air supply during the dive and reassures them that there are no leaks or malfunctions that could compromise their safety.

Establishing the functionality of these systems ensures that divers are adequately prepared for their underwater experience. While practicing emergency ascent procedures, equalization techniques, and reviewing dive signals are all important for safe diving, the immediate verification of gas delivery systems directly impacts a diver's ability to breathe underwater, making it the most critical step to take at the beginning of a dive.