AVERAGE BOTTOM REVERBERATION INTENSITIES 323 



variations from this typo of decay may be observed, even with the same echo-to-reverberation ratio at the 

 Careful examination of the results of reference 1 range of the reverberation peak. A preliminary study 

 shows that the shape of the decay curve is probably of the shapes of these decay curves over different 

 not the same over all types of bottoms. In other types of bottoms is being made off San Diego, but 

 words, the probability of distinguishing an echo at unfortunately, the results of that study are not avail- 

 long range is different over different types of bottoms, able at this time. 



