zone have a northerly component the north movement is even more general than 
indicated by the figures. 
The relation between current directions in the three zones was compared 
for each day. The results (Table 2) show that there is a much greater agree- 
ment in the currents just outside the breakers with those at the pier end than 
Table 2 
Comparison of Current Directions in Different Zones 
One Zone neutral or 
Agree in Opposed in rip current, the other 
Direction Direction North or South 
Surf Zone com- 
pared to Just Number 398 194 373 
Outside Breakers Per Cent Nr 33 2001 38.6 
Just Outside 
Breakers compared Number 556 126 306 
with pier end Per Cent 56.3 W257) 31 
there is between the surf zone currents and those directly outside. However, 
in view of the dominance of north currents inside the breakers and the slight 
majority of south currents on the outside one might have expected that more 
currents would disagree in direction than agree, which is not the case. There- 
fore, whatever produces a current ir one direction outside the surf has some 
tendency to produce a current in the same direction on the inside. Many of 
the direction disagreements are due to the fact that the current producer out- 
side the surf does not counteract the effect of the wave convergence on the 
south side of the pier. Furthermore, the cases where there is a south cur- 
rent all along the pier but a stronger current outside are times of strong 
north winds which must counteract the tendency for north flow inside the surf. 
Comparison with Crystal Pier 
The current statistics from Crystal pier observations are given in Table 3. 
Table 3 
Crystal Pier Statistics 
North south Rip Neutral 
Currents Currents Currents Currents 
Surf Zone Number 92 66 ho 13 
Per Cent 1.8 30.1 22 5.9 
Outside Number 70 65 7 37 
Breakers 
Per Cent 39.1 36.3 3.9 20a 
