Which organization’s research is primarily referenced for dive tables used by recreational divers?

The choice related to the US Navy is correct because the US Navy has conducted extensive research on diving physiology, decompression, and dive safety, which has been foundational in developing dive tables for recreational divers. These tables provide essential information regarding no-decompression limits, ascent rates, and safety stops, all critical for preventing decompression sickness during dives.

The US Navy's contributions include pioneering studies and operational procedures that inform diving practices. Their research has influenced many recreational diving organizations, as the principles of safe diving derived from their studies can be applied universally.

While PADI, NAUI, and CMAS also offer training and resources for divers, their dive tables and training materials frequently reference or build upon the foundational research conducted by the US Navy, making it the primary source of foundational dive table research for recreational diving.