r*7. 



Ihltf 



Machine* 

 Cor. r 



Reel 



Ttirm I 

 Shot or lead 

 Bottom 



Jlnthtin temperature. 



. VV/. of Thermometer 



Cor reeled temp* r< t lure 



> 'l> r y ^ Surfaee ^ 



Trawl or drcdjge or lau£lrx 



SOUNDING WIRE. 



bi i>VK. 



W. 



< i 



i<»-> 



200 

 joo 



500 



600 



800 



luuo 

 I loo 



I 'JOO 



1 



1 400 



1 y>j 



I ' ' X) 



J 700 

 tHoo 

 [OOO 



2 j no 



it/oo 



Dapth / 



( 'or. 



DREDGE ROPE. 



