The focus of this book is on the naval submarine body form design and related hydrodynamic effects. This book can help us to optimize the body form such as bow, stern, sailing, L/D ratio et.al. for minimizing the hydrodynamic resistance. Parallel middle body submarines are studied here. The safe and calm depth for earning fully submerged conditions, away from free surface effect and ocean waves are studied too. In this section, some new important criteria for evaluating the seakeeping performance of a naval submarine are presented. The specifications and advantages of the innovative plan and patent of "Moon-Korol" system for minimizing the wave effects on submarine motions at snorting depth are discussed. The wall effect due to moving a submarine close to the sea bottom or a torpedo inside a torpedo tube on the lift and resistance forces is evaluated too.