The Overhead (Cavern and Cave) Manual is the text-book literary assistant to the TDI Overhead (Cavern and Cave) certification course.

This manual will serve as your reference tool as you proceed through the various levels of TDI cave training. The TDI cave diving programs have been carefully crafted to teach cave diving specific practices and procedures. Dives incorporating decompression stops, rebreathers, or gases other than air require additional training.

Using the Overhead (Cavern and Cave) Manual as a reference, students may utilize the Knowledge Quest Work Booklet by answering the provided questions with the most appropriate and accurate answers. The Knowledge Quest is designed to be used as an assessment for enrolled students and their respective instructors.