56 55 54 53 



52 



52 



T" 



51 50 



49 



48 47 46 45 



43 



42 



FLIGHT 11 



16 MARCH 1968 



FLIGHT 10 



15 MARCH 1968 



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



Figure 10. — Ice Conditions, 15 and 16 March 1968. 



23 



