no apparent effect on the deterioration of the berg although on (> June it 

 shifted axis of flotation 20°. On 7 June the Androscoggin proceeded to 

 regular surface Ice Patrol duties. 



Bombing runs on 5 June on bergs in Bona vista Bay resulted in two 

 misses and two inconclusive hits. It was decided that a bomb sight should 

 be constructed to replace the crude markers in the cockpit of the plane 

 by which the pilot largely estimated the release point. On June 6-7 a 

 bomb sight was fabricated by modifying the plane's navigational drift 

 sight so that it could be rotated forwarded and set at a precise angle be- 

 low the horizontal. This angle was computed to be about 30|° for the 

 bomb trajectory from 1,000 ft. and was the point of release when the 

 image of the berg appeared in the sight. Slight corrections were available 

 to account for berg size, shape, fuze setting and ground speed of the plane. 

 Practice bombing on 8 June proved the sight to be eminently successful. 

 Of the remaining 12 bombs, hits were scored 11 times and the one miss 

 was, in part, due to failure of the fuze to open the cluster. 



Bombing was resumed on 10 June when two excellent hits were scored 

 on the first bombed berg at Virgin Rocks. Both hits occurred at the same 

 location, a previously unobserved crater on the front right slope of the 

 berg. Whether or not this crater was caused by the bombing is immaterial 

 as it in no way contributed to the disintegration of the berg which was 



Figure 19. — Close-up of the crater where bomb hit. Fragments of the magnesium- 

 petroleum bomblets burned for 18 minutes. It was hoped that the sud- 

 den high temperatures generated would fracture the berg along the 

 earth and ice veins clearly shown in this photograph. 



27 



