Reduction of Deep Sea Refraction Data 
Charles B. Officer and Paul C- Wuenschel 
Ie Introduction 
During the summer of 1950 an extensive two ship 
deep sea refraction operation was made on Atlantis 164 and 
Caryn 17 cruises. A total of seventy refraction stations 
were made on tracks from Bermuda to Charleston, Norfolk to 
Bermuda, Bermuda to the Nares Deep, Bermuda to Halifax, and 
Halifax to Woods Hole. Again during the spring of 1951 the 
opportunity arose to make another two ship refraction 
operation on Atlantis 172 and Caryn 22 cruises. Thirty- 
three profiles were made covering the Caribbean, the Puerto 
Rico Trough, and a track from Puerto Rico to Bermuda to 
Woods Holee 
It has been necessary to make several corrections 
and reductions to the raw data in order to obtain the final 
values for the travel time plotse The method of reduction 
of the deep sea refraction data is not found in any of the 
standard geophysical texts, and that used in shallow water 
seismic work is not applicable. It has been necessary to 
devise new methods as the occasion arosee These methods of 
reduction are, in general, quite simple; but it has been 
thought advantageous to present them in this form for the 
benefit of and use in future investigations. Further it 
is hoped that this report results in a uniform method of 
