showers. During both occasions the rain squall line was 20 miles wide and 

 moved across the PP1 scope at 15-20 kts. During the first occasion a 22- 

 foot growler below Cape Race was hidden intermittently by a storm which 

 lasted one hour. On the second occasion the weather completely masked 

 a 6- by 30-foot blue growler which the Evergreen was standing by above 

 the North Atlantic Shipping Track CHARLIE. The growler and weather 

 situation which confronted the writer and radarmen are shown in figure 

 38. We were unable to detect this target during the passage of the weather 



Figure '.18. — Illustration of rain squall masking a growler ((> by 30 feet i which should 

 have been discerned at 310° T; 3,000 yds. Situation lasted one hour. 



83 



