S *W - 



Jteel. ■- fa**/. 



r^-' ^ Machine 



Turns X* Cur. + J? 

 ^ffrot G? lead 



liobtoin Irmpuni/tirr. 



M. of tiurniomfiUir f & 0 (for. 



Corrected trmpwtturr ^ 

 Mr y j Surface / ' Drift 



TrawL or dredge. 



SOUNDING WIRE. 



DOWN. 



/JJO 



MM 



UP. 



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 300 

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1700 

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2300 



2400 



DREDGE ROP( . 



IM)WN. 



UK 



