The tables presented herein are computed fronn the above equation 

 and should be used in lieu of those in H. O. Pub. No. 614, 1951 edition. 



A. TABLES 



According to Wilson, the mean standard deviation of the error 

 between his equation and measured speeds over the range of variables 

 (temperature -4»C. to SCC, salinity 0%o to 37%o, pressure 1 to 1,000 

 kg/cm'^) is 0.30 nn/sec. With tennperature as the dependent variable, 

 the maximum standard deviation is 0.74 m/sec at Seilinity 0.00%o and 

 surface pressure, and the minimum standard deviation is 0.08 m/sec 

 at 36.55%o salinity and 420 kg/cm^ pressure. 



The accuracy of the equation at vailues higher than those shown 

 above has had some limited evaluation by Wilson. The difference 

 between the measured and computed velocities at some sample extreme 

 values are: 



Tables 1 through 6 were developed using the Wilson equation 

 programmed for the IBM 7070 computer. The speeds were connputed 

 to the nearest 0.01 m/sec and for convenience were rounded to the 

 nearest 0.1 m/sec for presentation. 



Although Wilson's equation is entered with pressure as a variable, 

 by assuming a unifornn water column of O'C. temperature and 35%o 

 salinity, a depth-pressure relationship is established; therefore, the 

 tables are presented so that they can be entered with depth or pressure. 

 A convenient depth interval from 1 nneter to 11,500 meters in the depth 

 (pressure) correction. Table 2, is used in order to minimize interpo- 

 lation; however, if it is desired to use in situ pressure to obtain the 

 pressure correction. Table 1 is to be used. Table 3, converted fronn the 

 original Kuwahara table, is to be applied to correct the sound speeds 

 for variations in gravity with latitude and depth. Tables 4 and 5 may be 

 entered with salinity to the nearest 0.01%o and temperature to the 

 nearest O.Ol'C, thus eliminating interpolation. The simultaneous cor- 

 rections for temperature, salinity, and depth (pressure) are presented 



