1109 
LIST OF SYMBOLS 
Velocity of sound in sea water (4.75 ft/millisec) 
Charge element at position x 
Energy ( f p*at) (in. 1b/in.*) 
° 
Impulse (f pdt) (1b sec/in.2) 
Charge length (ft) 
Pressure at any time t (1b/in.@) 
Pressure at time tp (1b/in.@) 
Pressure at time t; (1b/in.@) 
Shortest distance at which ty = t, for gauge position C 
ie = (v2 - 02) ] (ft) 
Distance at which t, = tL/2 for gauge position C, double-ended 
detonation 
Ie en cas - ?)] (tt) 
Distance from detonator end of the charge to gauge position A (ft) 
Distance from non-detonator end of the charge to gauge 
position B (ft) 
Distance from center of charge to gauge position C (ft) 
Arrival time of the signal from the charge element producing 
the final signal to reach the gauge (millisec) 
Arrival time of the first signal to reach the gauge (millisec) 
Arrival time of the signal from the non-detonator end of 
the charge (millisec) 
Arrival time of the signal from the midpoint of the charge (millisec) 
Arrival time of the signal from the detonator end of the 
charge (millisec) 
Arrival time of the signal from a charge element at distance x 
from the detonator (millisec) 
Velocity of detonation of TNT (19 ft/millisec) 
Charge weight (1b) 
Distance measured along charge from detonator (ft) 
Distance from the detonator to the charge element to produce 
the initial signal to reach the gauge (ft) 
Density of sea water at a given temperature and salinity 
5.58 + 0.0065 t, where t is the temperature in degrees Centigrade 
(the acoustic impedance of sea water) 
-V= 
