NSWC/WOL TR 76-155 



PMAX Shockwave peak overpressure referenced to initial 

 ambient pressure, p., but generally referred to as 

 "Shockwave peak pressure" 



Shockwave decay constant (Figure 3.1.1) 



PCORR Coefficient used to adjust Shockwave peak overpressure 

 for batch-to-batch variations in explosive charges 

 (Equation 3.1.1) 



PNEG Pressure during negative phase (measured from 

 hydrostatic) (Figure 3.1.1) 



R Slant range from charge 



R Radius of charge 



Rn 



Slant range from image of charge reflected in water 

 surface 



Sound speed in water 



U 



Shock velocity in water 



Detonation velocity in charge 



PVAP 



Vapor pressure of water 



ABS 



Absolute pressure 



Acceleration of gravity 



P D (t) 



Free-field or direct-arrival Shockwave overpressure 



P r (t) 



Surface-reflected overpressure wave 



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