Operational in over 90 countries worldwide, Reef Check is a global organisation combining education and research to help protect reefs and oceans. As a Reef Check surveyor, you can contribute to reef conservation efforts and dive for minimal costs while assisting with surveys, which will help us understand the threats our local marine ecosystems are facing. thousands of volunteer Reef Checkers around the world. Note that to take part in a Reef Check training course you must be qualified to Advanced Open Water Diver level or equivalent and have a minimum of 25 logged dives.