6) In the sixth column (CORR FT 2), the LESS NOISE 

 column is m.ultiplied by the calibration curve for the 

 shipborne record according to either Table 1 or 



Table Z. If this column agrees with the previous column, 

 at high frequencies, the calibration curve has been arbi- 

 trarily set equal to one to avoid extreme values at high 

 frequency. 



7) In the last two columns, the upper and lower 95% and 5% 

 confidence bounds are shown. 



The gr aphs of the spectra 



The graph that accompanies the spectral tabulation shows the 

 spectrum and the 95% and 5% confidence boixnds. The scale is chosen 

 so that the highest 95% confidence value is at the top of the graph and 



the vertical axis of the coordinate system shows the spectral values 



2 

 for that spectrum in units of (feet) . The scales change with each 



spectrum and comparisons between spectra by means of the graphs 



should be made cautiously. 



Acknowledgments 



We wish to thank the National Institute of Oceanography of the 

 United Kingdom for providing us with the wave records. Dr. J. 

 Darbyshire sent some of the records to us from South Africa. Mr. 

 D. E. Cartwright and Mr. L. Draper were most helpful in assembling 

 other records at N. I. O. having them copied and forwarding the re- 

 cords to us. The records were digitized at Johns Hopkins University 

 and at Davidson Laboratory of Stevens Institute of Technology. 



