sentences:  A comparison of database searches against a selection of publications known to have used scientific diving in the same period, shows that a small minority of papers were discovered, suggesting that the importance of scientific diving as a valid and cost-effective underwater research tool is greatly underrepresented in the literature.Some underwater work in support of science is out of scope of the relevant regulations, exemptions, or codes of practice, and is not legally classed as scientific diving.This work is required to be done by divers trained, registered, and operating following commercial diving health and safety practices.