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FIG. W-1.
**Water velocity**. (**a**) Velocity as a function of temperature and salinity. The speed of P-waves in water is given by

- $V=1448.96+4.591T-0.05304T^{2}+0.0002374T^{3}+1.34(S-35)+0.0163D+0.16563\times 10^{-6}D^{2}-0.01025T(S-35)-0.7139\times 10^{-12}TD^{3}~\mathrm {m/s}$

where *T*=Celsius temperature, *S*=salinity in ppm, *D*=depth in meters. (**b**) Typical velocity versus depth graph showing the low-velocity Sofar channel. (From Ewing *et al.*, 1948.)

- This page was last edited on 28 March 2018, at 09:19.
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