Human Factors in Diving Part 1: An Introduction Gareth Lock is a retired RAF officer and dive educator who is the Director of "The Human Diver". This is an organization that's mission is to improve the safety and performance of divers thru the study of Human Factors. Human Factors are the physical or cognitive properties of individuals, or social behavior which is specific to humans, and influence functioning of technological systems as well as human-environment equilibria. The safety of diving operations can be improved by reducing the frequency of human error and the consequences when it does occur. Gareth wrote the seminal book on the this topic: Gareth's website is: Human Factors in Diving Conference is: