,yo. of tktrtmnheter ^ i 4l Oor- 

 Corrected f enhpertUure 



Air - Surface Drift 



Drawl OM^dredg^ >^'^*J.,_^ 



SOUNDING WIRE. 



DOWN. 



TO©- 



VS 



3<» 

 400 



/ 600 



7rx. 

 Hno 



I ('HI 

 I ."X> 



( l<><> 



l4iX> 



1800 



•JHXJ 



3300 

 3400 



DR&OGE ROPE 



/it 



OP. 



