to the relations derived earlier; however, the icebergs of complex con- 

 figuration show deviations which at times are quite remarkable, but in 

 general conform qualitatively to what might be expected. Of interest in 

 this respect is the large pinnacled iceberg whose shape might lead to di- 



.8 1 2 4 6 8 10 20 

 RANGE IN THOUSANDS OF YARDS 



Figure 31.— Reflected power expressed in decibels above minimum discernible signal 

 plotted as a function of range for vertical face aspect of the large iceberg 

 (80 by 334 feet; 18,040 sq. feet i. 



72 



