56 55 54 



53 



52 51 50 49 48 47 46 45 4 4 



•A A 



^Iaa 



A%"^ A^^ 



A <- 



A^^^ A' 



M 



AAAM 



^ 



AA aA ^ 



-c; A 



A 



s± 



'FLIGHT 22 

 »9APRIL1968 



FLIGHT 

 11APRIL 



23 



1968 



56 55 54 53 52 51 50 49 48 47 46 45 44 



Figure IS. — Ice Conditions, 9-11 April 1968. 



31 



