What is the first rule in Sheck Exley's Blueprint for Survival for overhead diving?

The first rule in Sheck Exley's Blueprint for Survival for overhead diving emphasizes the importance of being trained. This highlights the necessity for divers to possess the appropriate skills, knowledge, and experience before attempting overhead dives. Proper training prepares divers to handle the unique challenges and risks presented by overhead environments, such as caves or other confined spaces.

Having the right training ensures that divers are not only familiar with safe diving practices but also understand emergency procedures and the physiological effects of diving in such environments. It equips them with the ability to make informed decisions and respond effectively to potential hazards. Training is foundational because, without it, divers may lack the competence to navigate complex situations safely, increasing the risk of accidents.

While being aware of surroundings, maintaining calmness, and knowing limits are all crucial aspects of safe diving, they rely on a solid foundation of training. Thus, proper training serves as the bedrock for a safe diving experience in overhead environments.