Sandford, Lieut. R. D., R.N., 210, 211, 213 Santiago, attempt to block in 1898, 54, 56, 58 _Scott_, H.M.S.; App. Seamanship, importance of, 41, 57, 58 Seaplane base, German, 12 Secrecy, 100, 111, 120, 121, 155 Secret, divulging the, 108, 119, 120 Shoals, 7, 41 Siege guns, 84 Signalling difficulties, 137, 138 Silt, description, 23, 24 effect of, 24, 28, 51 _Sirius_, H.M.S., 70, 143, 246; App. Smith, Petty Officer, R.N., 209 Smoke, artificial-- limitations of, 59, 60, 99 use of, 59, 60, 83, 99, 100, 175, 176, 208, 216, 217, 218, 246 Smoke-screen vessels, 83, 175 Sneyd, Commander R. S., R.N., 226, 228, 229, 235 Souvenir hunters, 248 Staff, operational duties, 66, 67, 139 Star shell, 38, 175 Stonewall Jackson's maxim, 60, 61 _Stork_, H.M.S.; App. Storming the Mole, 186, 187, 188, 200-204, 213 Submarines-- attack on viaduct, 82, 100 defensive use, 40 German, 4, 40 shelters, 10, 11 Submarines-- C1, 210, 211, 214; App. C3, 210-211, 213, 215, 224; App. Success, chances of, 54, 62 Supporting squadrons, 146 Surprise, 59, 60, 61, 262 Surveys, 7, 91 _Swift_, H.M.S.; App. Swin Deep, 118, 153 Synchronisation of events, 137, 138, 170 _Teazer_, H.M.S.; App. _Tempest_, H.M.S.; App. Teneriffe, Nelson's attack on--in 1797, 54, 55 _Termagant_, H.M.S.; App. _Terror_, H.M.S., 174; App. _Tetrarch_, H.M.S.; App. _Thetis_, H.M.S., 70, 143, 171, 226 _ff._, 233; App. Tidal stream-- description, 7, 24, 30, 74 effect, 24, 92, 174, 183 Tide, rise and fall, 8, 48, 49 Tigris River, blocking of, 58 Time factor, 137-139 Time table, 138, 156 Tomkinson, Captain Wilfred, R.N., 220 Towing-- necessity for, 142 of _Iris_ and _Daffodil_, 142, 143, 173 Trench raid, analogy, 112, 113, 265 _Trident_, H.M.S., 224, 245; App. _Truculent_, H.M.S.; App. _Ulleswater_, H.M.S.; App. United States-- battle squadron, 107 personnel, 107, 108 _Velox_, H.M.S., 224; App. Viaduct-- attack on, 194, 195, 210-215 description, 23, 25, 82, 83 _Vindictive_, H.M.S.-- anchoring, 184 attack on Ostende, 247 choice of, 76, 126 command of, 114 damage, 181, 182, 198, 238, 239, 241, 255, 256 fitting out of, 77-79, 100, 110 position at Mole, 128, 129, 202, 203 proceedings of, 143, 148, 150, 170, 173, 176, 179 _ff._, 200 _ff._ retirement of, 230 ff. Visibility, 136, 165 Volunteering-- for danger, 89, 122-125, 189, 202 how arranged, 104, 105, 122, 123 Von Capelle, Admiral, 158 Walcheren expedition, 156 Walker, Lieut. H. T. C., R.N., 190 _Warwick_, H.M.S., 144, 168, 173, 220, 221, 222, 233, 243; App. Weather, vagaries of, 41, 93, 246 Weller, Major B. G., R.M.L.I., 202 Welman, Lieut. A. P., R.N., 217 Wemyss, Admiral Sir Rosslyn, R.N., 157 _Whirlwind_, H.M.S., 224, 230; App. Wind, importance of direction, 60, 131, 176 Wounded, behaviour of, 196, 197 Youlton, Petty Officer, E. G., R.N., 238, 242 Young, Lieut.-Comdr., R.N.V.R., 225 Yser Canal, 7