Originally printed in 1946, The Fleet Type Submarine series of technical manuals remains unparalleled. Contained in its pages are descriptions of every operating component aboard a fleet boat. Main Propulsion Diesels examines the submarine¿s power plant in detail, from starting and control systems to fuel and exhaust, and cooling and lubrication systems. Originally classified ¿Restricted¿, this book was recently declassified and is here reprinted in book form. Some illustrations have been slightly reformatted, and color plates are reproduced in black and white. Care has been taken to preserve the integrity of the text.