acuc training courses range from "snorkel diving" and entry levels such as "scuba diver" and "open water diver" to "master diver", as well as numerous specialty diver programs. leadership level programs start from "divemaster", and progress to "instructor trainer evaluator", which is the highest level within the acuc training ladder. through affiliation with lifeguard systems, based in shokan, new york, usa, they also provide public safety diving and surface ice rescue certifications used by numerous fire and police service groups internationally.