The book is dedicated to the memory of the lost sailors of the submarine "Kambala", which entered the Black Sea Sub-Plav in the first decade of the twentieth century, which became the first Russian submarine to perish with its entire crew. The book is unique in its richness of information from the history of the formation of the same type submarines "Kambala", "Crucian" and "Karp". The author - Vladimir Boyko, a professional submariner - talks in a fascinating and detailed way about the development of a new class of ships, about the evolution of the combat use of submarines and their weapons. The history of the appearance of the submarine "Kambala" together with similar submarines " Karp" and "Crucian Carp" as part of the Russian Imperial Fleet, the design features and unknown details of the service are of significant interest not only for submariners of the Navy, but also for all readers who are interested in the history of the Russian Submarine. The book is accompanied by rare photographs, copies of archival documents and excerpts from documents that were kept classified as “Secret” for a long time.