

40' 



40° 



40° 



11 



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 I 11 

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 II 

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 II 

 II 



III, 



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J jun . JUL I AUti . ^bP I c 



' vvv V — 1 1 V ">J" — ^^' \V_-^ l\U V \ V — 77 — !> /'/, 

 \ »\\\ ^W X- ^^ i\\^ \ ^^ <// ' 



Xso" 



Figure 7. Nantucket Lightship, 1956. (Dashed line in upper diagram, mean for period 

 I9I+7-I952, 8 miles WSW of present position) 



38 



