' I (jti /_ Machine. UoeL 

 Tttrto Cor. i Depth 



SJujL or lead f ' 

 Bottom 



v yn/LSu 



V>nU,m\ tmiperal ttrr 



J\o. of Th*;i nunm h r ( or. 



Corn rlvd h n> />( rut ure. 



Air Surfarr. Drift. 



Trawl or (Irt'd^r or IrmgltiH 



SOUNDING WIRE. 



TUItNS. 



DREDGE ROPE. 



, l.r.WN, 



— i 





Iio W.N. 



I»P. 























1 1 • i 



ZOO 





















500 











( K >i f 











700 











nlXj 











j /i ( > 











J woo 











I loo 











l MO 











1 |O0 



















1500 











11, 











1 J*l " 1 











r tt< > 1 











HfM 











20CO 











J IOU 











lata 



























