ceived from the ship to that received from the iceberg was 200 but be- 

 cause the illuminated ship cross-sectional area was 3.2 times that of the 

 iceberg (c.f. fig. 29) and because a linear relation has been shown to exist 



.8 1 2 4 6 8 10 20 

 RANGE IN THOUSANDS OF YARDS 



'igure 30. Reflected power expressed in decibels above minimum discernible signal 

 plotted as a function of range for a small iceberg (27 by 84 feet; 1,460 

 sq. feet I. Locus is least squares besl tit. 



70 



