was plotted, superposed on the contour movement plots and the breaker depth 

 was then determined. Comparison o£ the contour and breaker position move- 

 ment plots from these two experiments with similar plots from experiments 

 71X-06 and 71X-10 where the breaker position was determined and recorded 

 during each run, indicates that the estimates from the slides were prob- 

 ably within 1 foot of the actual position. 



89 



