REPLY TO THE DISCUSSION 40 5 



L. Vassilopoulos and P. Mandel, Massachusetts Institute 

 of Technology, Cambridge, Massachusetts 



SOME TOPICS IN THE THEORY OF COUPLED SHIP MOTIONS 407 



J. Kotik and J, Lurye, TRG Incorporated, Melville, New York 



KNOWN AND UNKNOWN PROPERTIES OF THE TWO-DIMENSIONAL 

 WAVE SPECTRUM AND ATTEMPTS TO FORECAST THE TWO- 

 DIMENSIONAL WAVE SPECTRUM FOR THE NORTH ATLANTIC 

 OCEAN 425 



W. J. Pierson, Jr., New York University, New York, New York 



DISCUSSION 434 



A, Silverleaf, National Physical Laboratory, 

 Teddington, England 



REPLY TO THE DISCUSSION 435 



W.J. Pierson, Jr., New York University, New York, N.Y. 



FORCE PULSE TESTING OF SHIP MODELS 439 



W. E. Smith and W. E. Cummins, David Taylor Model Basin, 

 Washington, D.C. 



DISCUSSION OF FOUR PAPERS 457 



L.J, Tick, New York University, University Heights, 

 Bronx, New York 



DETERMINISTIC EVALUATION OF MOTIONS OF MARINE 



CRAFT IN IRREGULAR SEAS 461 



J. P. Breslin, D. Savitsky, and S. Tsakonas, Stevens Institute 

 of Technology, Hoboken, New Jersey 



DISCUSSION 498 



J. F. Dalzell, Southwest Research Institute, 

 San Antonio, Texas 



DISCUSSION 499 



M. Fancev, Institut Za Brodska Hidrodinamika, 

 Zagreb, Yugoslavia 



DISCUSSION 500 



G. J. Goodrich, National Physical Laboratory, 

 Teddington, England 



DISCUSSION 500 



S. M. Y. Lum, Bureau of Ships, Washington, D.C. 



REPLY TO THE DISCUSSION 504 



J. P. Breslin, D. Savitsky, and S. Tsakonas, Stevens 

 Institute of Technology, Hoboken, New Jersey 



TESTING SHIP MODELS IN TRANSIENT WAVES 50 7 



M. C. Davis and E. E. Zarnick, David Taylor Model Basin, 

 Washington, D.C. 



DISCUSSION 541 



E. V. Laitone, University of California, Berkeley, Calif. 



REPLY TO THE DISCUSSION 542 



M. C. Davis and E. E. Zarnick, David Taylor Model 

 Basin, Washington, D.C. 



PREDICTION OF OCCURRENCE AND SEVERITY OF SHIP 



SLAMMING AT SEA 545 



M. K. Ochi, David Taylor Model Basin, Washington, D.C. 



DISCUSSION 589 



G. Aertssen, University of Gent, Gent, Belgium 



vii 



