'WT. 



4- 



- Machine. - 



rti.rii.K ^{t 4- 



I 



-^ir Surface 

 Trawl or dredge 



i/3 



Ml'. 



. T\ \* SOUNDING WIRE. 



O 



3CIO 



400 



800 



900 



1000 



1500 



t|OQ 



l6ar> 

 tfiou 



3400 



Depth "i-^ 



Oar. ^' 



Drift 



DREDQE ItO^t. 



