si 



C ' L' ■ - Machine JUel. . / 

 Tunis $ Cor. + /£ 

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.Vo.of UuM'nwnir.Ur 

 Corrected lam>jjiratur& 3*£» O 

 Air Surface Y^jT Drift 



Cor, -O'X^ 



SOUNDING WIRE, 

 UP. 



down. 



- 



fit, *j 



R 



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3O0 



400 

 500 

 600 

 700 

 600 

 900 

 1000 



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BOOQ 



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DREDGE ROPE. 



DOWN. 



V 0 X 



1 ',71 



■ 



OP. 



4 

 1 



