FIGURE 4-5. SPEED OF SOUND IN SEAWATER (WILSON) 



C=1449.14+Ct+Cp + Cs + Cstp 



Ct = 4.572 It- 4.4532 xlO-^t^- 2.6045 xlO-^ts 



+ 7.9851 xlO-n" 



Cp = 1 .60272 X 1 0- V+ 1 0268 x 1 0-=p^ 



+ 3.5216x10-'p3-3.3603xl0-"p^ 



Cs= 1.39799 (S-35)+ 1.69202x10-3 (S-35)2 



Cstp = (S-35) (- 1 .1244X lO-^t+7.771 1 x lO'^t^ 



+ 7.7016xl0-5p-1.2943xl0-7p2 + 3.1580xl0-8pt 



+ 1.5790xl0-'pt2) + p (-1.8607xl0-n 



+ 7.4812X 10-*t2 + 4.5283x 10-8t3) 



+ p2 (-2.5294xl0-^t+1.8563xl0-'t2) 



+ p= (-1.9646xlO-'ot). 



WHERE: C IS SOUND SPEED IN m/s 



t IS TEMPERATURE IN °C (-4°C< T<30°C) 



S IS SALINITY IN °Lo ( 7oo < S <37%o) 



p IS PRESSURE IN kg/cm' OR ATMOSPHERES 



(lkg/cm2<P<1000kg/cm^) 



J. ACOUST. SOC. AM. 32, 1357 (1960). 



42 



