Daniel Pastwa - he has been diving since 2006, an IANTD trimix technical diver, a wreck diver, a Baltictech support diver, a film-maker diver- the author of several dozen diving movies, number of dives made>500; number of wreck dives >300; an amateur historian of the war in the Baltic, in the context of submarine operations during World War II in particular. The author of several shipwrecks identification.