This book investigates the practical methodologies and scientific potential of conducting experimental research directly within the underwater environment. Author J.D. Woods, drawing from his expertise in oceanography and diving, provides a framework for researchers to transition from surface-based observation to active, submerged experimentation. The text argues that the human presence in the water column is a necessary component for advancing marine science and data collection accuracy.

Experts recognize this work as a foundational text for the development of scientific diving as a formal research discipline. Readers frequently note the technical clarity of the prose, which serves as a practical manual for early practitioners in the field.