The modern combat ship is a complex vehicle serviced by hundreds of naval specialists. They are in charge of numerous mechanisms, machines, devices, devices and other means of navigational, artillery, mine, observation and communication, electromechanical and other combat units. Knowing a modern ship, knowing a modern navy means being able to understand ship theory and structural mechanics, hydrodynamics, hydraulics and pneumatics, energy and mechanical engineering, ballistics, rocket and nuclear engineering, electrical engineering, radio engineering, electronics, optics, sonar, radar, automation, telemechanics and cybernetics. This book is a collection of drawn and textual problems on the history, technology and physics of naval affairs and is intended as an auxiliary educational material for young ship modellers, young sailors, Dosaafovites studying naval specialties, as well as for a wide range of readers interested in naval affairs. A special place in the collection is given to the physical foundations of naval equipment and naval professions.