SUBJECT INDEX 



359 



Shortness of pressure pulse, 285 

 Side drift, Kill 

 Side sway, KiO 

 Significant 



l)oriods, 51 



range of periods, 42 



wave lii'lghts, 25, 51 

 Similarity conditions in ship viln-atioii, cMiiscd l)v shiiiiiniiig, 



2!)ti. :5(IS, HIO 

 Simple harmonic oscillator, 1(10, 158, 15!) 

 Skeg, 146, 105, 100, 20i), 215 



areas, 125 

 Skin friction, :i. 4, 8, 14 

 Slamming, I '.10. 192, 195, 217, 250 



immersion of liow flare, 280, 304 



impact, 28:i, 284, 290, 305, 310 



Kent's ilefinition, 130 



model experiments, 308 



stresses, measured on destroyers at sea, 288 



towing tank data, 138-142 

 Slender body (or strip) theory, 109 

 Slope of water surface, 2, 10, 18-20 



Smith effect, 115, 1()3, ISS, 190, 2.56, 257, 261, 265, 207, 209, 274. 

 340, 341 



moditication of by a ship, 1.55, 259, 201, 340 

 Smoothing operation, 03 



Spectral, 



ciinipiinents, 42 



density, 17, 02, 69, 72 

 Spectrum, 10, 17, 29-48, 52-5.5, 86 



co-ctimulative, 41 



continuous, 329 



co-spectrum, 173 



cross, 173-170 



descriptive, 54, 86 



directional (or two-dimensional). Hi, 74-80. 82, 84, 88, 170, 

 212, 217 



of air pressure fluctuations, 17 



power or energy, 59-74 



quadrature, 173 



raw, 04 



scalar, 61, 02, 70, 73, 74 78, 170 



smootheil, 64 

 Specular point, IS 



Speed, 



attainable liy destroyers in waves, 279, 281-283 



in ship operating conditions, 243 



loss vs. ship form, 249 

 Spray root, 137, 308 

 Spring constant, 106 

 Stabilization of 



])itchiug, 209 



rolling, 208 



Stabilizing gyros, water tanks and tins, 208 



Static concept of wave energy, 81 



Stationary random time series, 346 



Statistical, 



studies or anah'sis, 300 

 theory, 18, 205, 298, 310 



Steering system, automatic, 210 



Step-by-step integration, 157, 103, 16,5, 182, 211, 213, 215, 200, 



307 

 Stereophotographic measurements and data, 17, 76, 186, 190, 192, 



198, 212, 329 

 Stochastic, 59 



Stokes' theory of waves, 320, 329 

 Strain gage, see Gages 

 Stralsund (fishing trawler), 196 

 Strip theory or method of analysis (also cross-flow hypothesis), 



107, 108, 109, 114, 122, 123, 125, 129, 130, 130, 143, 154, 



1.57. 214, 253, 310, 338, 343, 344 

 Surface slick, 18 



Supercritical conditions, 190 

 SWOP (a project), 48, 74, 70. 80 



T-2 tanker, 2.59, 260, 26,5-274, 278 

 Tangential, 



<lrag, 1(J-13 



force or force coelllcieiit, 9, 29, 327, 333 



stress, 33)5 

 Thin ship, 132, 344 

 Towing tank, 179 

 Transfer functions, 61. 169, 171, 348 



complex, 174 



directional. 170 

 Transient, 



behavior, 291 



lichavior in rolling, 161 



elastic vil>ration, 292, 293, 310 



res])onse, 214, 215 



state, 25, 290, 305 

 Traveling disturbance (or ])ressure area), 2, 17 

 Three-dimensional effects, 114, 122 



Tucker's wave recorder, 34, .52, 8.5, 211, 216, 217, 30(;, 307 

 Turbulence, 82, 83 



stimulation, 4, 179 

 Turning radii, 124 

 Two-node hull vibration, 267, 279, 284, 290, 305 



Unimak ( U.SCCiCj, 285-288, 290 



Velocity, 



gra.lient, 3, 4, 10, 23, 82-84, 328, 341 

 I)erturbation, 109, 130, 131, 132, 338 

 potential, 107, 109, 111, 130, 131, 132, 182, 316-318, 338, 339 



Vibration, 257 



apparent perio<i, shortening with time, 291 



caused by shunming, 136, 284, 287, 290, 294 



decay of, 139, 284, 293, 296 



forced, 292 



free, 291 



modes, 292, 294, 296, 305, 309 



natural period, 267, 290 



response, 296, 297 



similarity conditions, 296 



transient, 290, 292, 293 



Victory (SS), 238, 248 



Victory type sliip, 237, 248 



Viscosity, 



air, 2, 3 



effect in waves, 83 

 luolecular, 14, 18, 24, 25 

 turbulent, 14, 15, 25, 334, 335 

 water, 2, 127, 130 



Wave, 



aiisorbing beach, 147 



apparent length, 239 



characteristic, 28, 29, 30, 39, 330, 331 



components, 2, 47, 180 



development, 48-51, 87, 320 



dispersion, 25 



energy, 30, 38, 322, 332 



generation, 1, 4, 16, 20, 47, 81, 178, 179, 326 



groups, 16, 307, 322, 330 



growth, 24, 80, 81, 87 



-maker, jjlunger type, 147, 180 



practical wave prediction, 51-54 



profile, 2, 188, 261, 202, 264, 209, 272, 273, 308 



profile indicators, 180, 192 



reflection, 82, 84, 178, 238 



steepness, 26, 81, 83, 193, 309, 310 



Waves, 



amplitude cau.sed by njlling of noncircular c>'linder.s, 129 

 apparent periods, 40, 41, 55 



