The Submarine Torpedo Boat
Its Characteristics And Modern Development

TACTICAL EVOLUTIONS OF THE SUBMARINE 159 ship and torpedoed her alongside a pier at Rodosto, and even entered the harbor of Constantinople sinking a trans- port alongside the arsenal. The E-14 also accounted for a Turkish gunboat in her passage into the Sea of Marmoro. Inside she sank a transport on April 29, a gunboat on May 3, and a large transport loaded with troops on May 10, and chased a small supply ship aground on May 13. 1'he submarine has thus through its enterprise effectively hampered the operations of the capital ships, if nothing more. Defensive Operations The tactics of the submarine for harbor defense are simple. The waters outside of the harbor entrance are divided into zones so situated with respect to each other that they will effectually cover all approaches to the har- bor. Each of the boats comprising the submarine flotilla which is to defend this particular port will be assigned by the flotilla commander to one of these zones. The boat will then take her position in the center of the zone assigned to her and at such a distance from the port as to prevent the enemy from ever coming within range of gunfire. Trimming to the “awash” condition and with radio up the submarine will here come to anchor and proceed to keep a sharp lookout for the enemy. Outside of this line of defense, the destroyers or other scouts in touch with the movements of the enemy will keep the submarines apprised of his position and probable course by means of the radio. To facilitate the sending of warning signals, the sea within a radius of 150 miles will be further divided into districts blocked off into small squares designated by numerals, and the points of the com- pass given short code words to designate the course pur-