Figure 43. — PPI scope photographs illustrating the effectiveness of sector scan for 

 the detection of icebergs (please see text). 



lations today is beyond the training and skill of the majority of operators. 

 It is recommended that rather than perfecting new devices which might 

 more confuse the operator, a method of automatically applying various 

 elements of sensitivity time control, fast time constant, and logarithmic 

 echo amplification be considered. Perhaps a spectrum analyzer can be 

 developed which could activate, automatically, these elements in the 

 proper quantities depending on the spectrum of the sea return. This 

 would certainly improve the potentials of a radar for detecting not only 

 ice, but all targets in sea return. 



Finally, based on the unequivocal conclusions of the studies conducted 

 during the past 15 years: 



All Ship Masters, Mates, and Owners are Warned That Safe 

 Passage Through Iceberg Areas of The North Atlantic Ocean 

 Cannot be Assured by the Use of Radar. 



21 December 1959 



96 



