THEORY OF SEAKEEPING 



responsibility for them. Although it is expected that 

 the emphasis on shortcomings alone will inspire the 

 reader to further research, each chapter is concluded with 

 a direct discussion and listing of desired research prob- 

 lems. 



Lists of references are attached at the end of each 

 chapter and are divided into three groups : First, a listing 

 of basic te.xts, which ha^•e attained the standing of 

 te.xtbook or are close to it. These are designated by 

 the author's name and a capital reference letter (A, B, 

 C, and so on). This group also includes complete 

 chapters in symposium and encyclopedic book types. 

 The .second group is composed of references to the most 

 important research papers and articles a\'ailable, most 

 of which were acti\'ely used in the preparation of the 

 monograph. These are listed by author and year of 

 publication, with the addition of lower-case letters (a, 

 b, c, and so on) if the author published more than one 

 paper in a given year. References cited thus in the 

 text will be found at the end of the chapter in which they 

 are mentioned. References are preceded by chapter 

 number if located in another chapter. For instance, a 

 reference to "Neumann (19526)" cited in the first chap- 

 ter will be f(nuid at the end of that chapter. If cited in 

 another chapter, it will appear there as "Neumann 

 (1-19526)." 



The third group is composed of miscellaneous refer- 

 ences taken from other sources, but not examined. 

 Responsibility for the completeness and accuracy of these 

 references lies with the sources. The detailed listings 

 are often omitted in this group and references made to a 

 bibliography a\ailable elsewhere. No effort has been 

 made to eliminate repetition of references in the various 

 bibliographies used or listed. 



The author ailopted the practice of cjuoting original 

 sources, whene\-er these were sufficientlj' brief and clear 

 for the conden.sed exposition of the monograph. No 

 changes were made in (|Uotations from the original text, 

 except of symbols and figure numbers. It was the 

 author's intention at the beginning to retain the original 

 symbols, but the re^•iewers of the early draft were unani- 

 mous in recommending a uniform nomenclature. The 

 autlKjr assumes no responsiliilitj' for the mathematical 

 work of the sources used. Also, the author does not 

 undertake to reconcile the differences of results and 

 opinions of various investigators. The material pub- 

 lished by \-arious researchers is presented and often 

 critically reviewed, but the ultimate deductions are 

 considered to be a part of research acti\-ity undertaken 

 in the future. 



A large number of copies of the .seakeeping mono- 

 graph draft were distributed to \-arious persons engaged 

 in oceanograph.v and na\-al architecture, as well as to 

 the members of sponsoring bodies, and critical comments 

 were invited. These comments were considered by the 

 author in the preparation of tlie final monograph copy. 

 It is, however, unavoidable that differences of opinion 

 will exist among scientists and engineers engaged in 

 \'arious aspects of the broad field of activity covered by 

 the monograph. These are particularly aggravated by 

 the fact that the rational treatment of ship motions and 

 stresses caused by sea waves is a relatively new subject, 

 many aspects of which are still controversial. The author 

 has to accept, therefore, the sole responsibifity for state- 

 ments and opinions given in the seakeeping monograph. 

 The sponsoring bodies are not responsible for these opin- 

 ions, and indeed, individual members of these bodies may 

 not agree with all of them. 



New York, N.Y. 

 January, 1960 



B. v. KoRviN — Kroukovsky 



