.6 .8 I 2 4 6 8 10 20 

 RANGE IN THOUSANDS OF YARDS 



Figure 25. — Reflected power expressed in decibels above minimum discernible signal 

 plotted as a function of range, logarithmic scale, for a large iceberg 

 (43,900 sq. feet) and the stern of the CGC Evergreen (740 sq. feet). The 

 agreement between duplicate runs on the same aspect (165 by 380 feet) 

 and the similarity of iceberg attenuation rate with that observed on a 

 ship target are illustrated by least squares, best fit curves. 



59 



