MacNamara, Right Hon. T.J., Madden, Admiral Sir Charles, Malta, hydrophone training school at, Manisty, Fleet Paymaster H.W.E., appointed Organizing Manager of Convoys, Margate, bombardment of, Mark-Wardlaw, Lieutenant, decoy ship of, Marx, Admiral J.L., Mary _Rose_, sinking of, Mayo, Admiral, and author, object of his visit to England, visits Grand Fleet, witnesses bombardment of Ostend, Mediterranean, the, Japanese destroyers in, narrow waters of, need of a unified command in, shipping losses in 1917 in, Mercantile marine, daily average of, passing Lowestoft and Dover, schools of instruction for, wireless for, (See also Merchant ships) Mercantile Movements Division, formation of, its head, Mercantile repair work, shipbuilding, Merchant ships, arming of, convoying, losses of, route orders for, submarines and, (Cf. Mercantile marine) Merz, Sir Charles H., Milford Haven convoy, the, losses in 1917, Mine-cutters (see Paravanes) Minelayers, fleet of, strengthened, Minelaying, British and German methods of, contrasted, Minelaying by submarines, difficulty of dealing with problem of, Mine net barrage, definition of, Mines, American, Britain, number laid in 1915-17, number of submarines sunk by, Mines and minefields, as protection against enemy submarines, "H" type of, improved type of, inadequate supply of, influence of, in Great War, Minesweepers, delay in deliveries of, Minesweeping and patrol services, Minesweeping craft, damage caused by mines to, gallantry of officers and men of, Minesweeping Division, formation of the, Minesweeping, introduction of a chain-sweep, statistics for 1916, 1917, Ministry of Munitions, formation of, _Minotaur_, Mobilization and Movements Department, formation of, Monitor M15, loss of, Monitors, bombardment of enemy ports by, Morris, Sub-Lieutenant K., Motor boats, coastal, launches as submarine hunters, fitted with hydrophones, in home waters and in the Mediterranean, Murray, Sir O., Nash, Mr., invents the "fish" hydrophone, Naval Ordnance Department, the, changes in, Naval Staff and the movements of convoys, confers with masters of cargo steamers, minesweeping section of, Operations Division of, strengthened, reorganization of, Navy, the, a specialized profession, considerations on the future of, personnel of: importance of, Staff work in, work of, during 1917, _Nelson_ attacked and sunk, Net barrage at Dover, Net protection against torpedo fire, at ports of assembly, Nets as an anti-submarine measure, New York and Hampton Roads convoy, losses in 1917, Nicholson, Captain R.L., North Foreland, the, naval guns mounted in vicinity of, star shells supplied to, North Sea barrage, the, advantages and disadvantages of, North Sea, the, convoy system at work in, Norway convoy, the,