The book describes probable deployment of submarines in different parts of the world. The chapters include basic principles that are required to be followed when deploying them on operational and tactical missions. The book is particularly useful for the newer submarine operating navies around the world. Contents;- The Undersea Environment, The Submarine, Submarine Control, Deployment Strategies, Passage Planning, Deployment Areas, The Arctic & Atlantic Oceans, Pacific & Indian Oceans, Actions By The Submarine, Survivability Considerations, Evasion At Sea, Intelligence Reconnaissance, Ssk Operations, Torpedo Attacks, Operational/Tactical, Missile Attacks, Mine Laying Operations, Submarine Communications, Operating In Complex Environments, Submarine Rescue, Remotely Operated Vehicles From Submarines, And Crystal-Ball Gazing. Cmde P.R. Franklin, AVSM, VSM, did his submarine training in Vladivostok, in erstwhile USSR. He commissioned the third and the sixth of the eight 'Foxtrot' class submarines that the Indian Navy purchased in the late sixties/early seventies. He subsequently commanded two of them. After a few squadron appointments both afloat and ashore, he headed the submarine arm as Director Submarine Operations in Naval Headquarters. Among his other appointments in the navy, he was Naval Assistant to the Chief of the Naval Staff and the Naval Advisor to the Indian High Commissioner in UK.