360 



THEORY OF SEAKEEPING 



Waves 



apparent steepness, 42 



breaking of sharp crests, 329 



capillary, 1, 87 



damping of, 323 



decay of, 25, 26, 51 



energy dissipation Ijy, 13, 14, 334 



from an oblique direction, 143 



gravity, 1, 10, 87, 316 



in rectangular tanks, 324 



irregular, 1, 7, 10. 23. 24, 36, 54, 55, 57, 80, 82, 84, 87, 89, 



152, 161, 164, 166-181, 185, 198, 200, 201, 206, 207, 



282, 283, 286, 298, 302, 307, 308 

 long-crested, 152 

 length of crests, 329 

 macroscopic description of, 86 

 modulus of decay, 323 

 of finite am])lituile of height (Stokes') 

 of small amplitude, 316 

 short-crested (also short-crestetlness), 



204 

 significant (see also Wave height, significant), 20, 25, 33 



39, 45, 48, 51, 337 

 standing, 324 



trochoidal, 5, 193, 198, 314-316 

 Wave age, 26 

 Wave celerity, 1, 4, 9, 10, 14, 20, 23, 24, 29, 80, 81, 249, 314 



317, 334 



5, 310, 320. 329, 

 20, 85, 180, 



16 



149, 

 279 



332 

 181, 

 , 36, 



316, 



Wave gage or recorder, 36, 206 



also see Tucker's wave recorder, 



])(irtal:)le, 217 



sliipborne, 55, 50, 60, 73, 78, 210 

 Wave height, 



a]>parent, 54, 56 



effective (in causing stresses). 188, 263, 273, 277 



equivalent (in energy content), 31, 33, 34, 35 



significant. 25. 48. 57, 178, 212 

 Wave number, 14, 16, 17, 21, 2.3, 75, 78 

 Wave pole, 60, 76 

 Wave spectrum, 29-48, 52, .53, 54 

 Wavelets, 15, 84, 87 



sharp-crested, 142 

 Weather, 



conditions, 51 



fai'tor, 246 



scale, 248 

 Weather Exjjlorer (weather ship), 34 

 Wetted, 



beam, 276, 297 



bottom area, 284, 308 

 Wind, 



duration, 20, 22, 29, 42, 45-51, 54, 86 



gradient, 31, 32, 35 



shearing forces, 332, 333 



velocity gradient, 10, 13, 328, 333 

 Wind tunnel, 4, 10, 82, 197 



