According to Sheck Exley's Blueprint for Survival, an overhead diver should avoid __________ __________ beyond their level of training.

The correct answer highlights the importance of adhering to the limits of one's training and experience in cavern diving. Sheck Exley’s Blueprint for Survival emphasizes the principle of not engaging in activities or diving practices that exceed an individual’s certification and training level. Deep diving often involves increased risks such as managing greater pressure, understanding advanced gas management, and handling potential emergencies that may arise at deeper depths.

Staying within the boundaries of training is vital to ensure a diver's safety and to maintain the ability to effectively respond to unforeseen situations. Engaging in deep diving without proper training increases the likelihood of accidents, as divers may not be prepared for the physiological effects of depth, including narcosis and decompression sickness.

Maintaining safety protocols while diving means understanding one's own limitations and recognizing that certain environments and depths require specialized training that goes beyond basic cavern diving certification.