In September-October 2014 I successfully participated in an intensive training towards a Scientific Diver Certificate, with 35 training dives in the harbour basin of Geomar and on board of RV Littorina up to a depth of 30m. The intensive training is designated for individuals with previous diving experiences, so we were a very mixed team composed predominantly of marine biologists, one maritime archaeologist (i.e. me), and even two German Navy mine clearance divers. Our training officer was Roland Friedrich, a retired lieutenant commander, who trained many generations of scientific divers. We benefitted greatly from his extensive experience, not only in terms of the technical and safety aspects of diving, but also his leadership in forging together very diverse people within a fraction of time, which made it – as exertive as the training was – an unforgettable experience.