MANNING of British ships in past, 20 Mercantile fleets under convoy, 116 -- Marine, 122 -- shipping in danger zone, 209 Merchant ships, loss of, due to mines, 155 Methods of attacking submarines, 134-142 Mine barrages, 129, 139, 156, 179, 286 Mine-field, Christmas on, 192-200 Mine-fields, deep-laid, 139, 179-186 Mine-layers, 233-236 Mine nets, 39, 138 Mine-protection devices, 175-178 Mined areas, isolation of, 159 Minesweeping, 54, 121, 157, 178, 209, 293-300 Mine-laying from U-C boats, 152-153, 157 Mines destroyed by British Navy, 155, 158, 209 Mines, floating, 150 Mining School, Portsmouth, 163 M.L.'s. See under Motor Launches Modified sweeps, 96-101 _Moewe_, German raider, 145 Monotony, effect of, 280 Moonlight, effect of on searchlights, 297-298 Moral effect of air raids, 295 Moray Firth, mine-field in, 161 Morning divisions in warships, 41 Motor launch flotillas, 36, 115, 134-136 Motor launches, Admiralty contract for, 57 Motor launches, arrival of, 38 -- construction of, 58-62 -- description of, 56 -- area patrolled by, 61 -- loss of, 62 -- in actions off Zeebrugge and Ostend, 62, 287 Mysteries of sea war, 264-272 -- of submarine hunting, 126-162 -- of German mine-laying, 143-156 -- of minesweeping, 157-178 Mystery ships, 96, 101 -- numbers employed, 96 NATIONAL Insurance, 125 Naval bases, 102-115 -- centres, 129 -- College, Greenwich, 35 -- policy, British, 31 -- School of Submarine Mining, 163 -- situation in 1914, 18 Navigation, dangers of, in war time, 265-266 -- training in, 46-49 Navy, expansion of, in past wars, 28 Nerve tension before action, 261, 288 Nets, submarine, 56, 85-89 New fleets in being, 50-69 New navy, composition of, 50-69 -- formation into flotillas, 68-69 -- growth of, 23 -- officers and men of, 25, 33-34 -- _raison d'etre_, 18 _New Zealand_, H.M.S., 255 New Zealand, officers from, 39 -- waters, mines in, 145 Nieuport pier, destruction of, 292 Night attacks, 258-263 -- patrol, 209, 292 North Sea, area of, 20 -- British naval blockade of, 124 -- gales, 220 Northern mine barrage, 182 OFFICERS, training, 36-49 Oil trails, 218, 263 PARAVANES, 175-177 Patrol areas, 23-24, 128-131 -- boats, 130-133