9 



jffytJ}- /X — Maahinn. /;.;;/. 



4 , 1 



llnUoin 

 JJottoin lr in pr rain re 

 .Yo, of thermometer H> 

 Coi 1 rcttjff Ikiu fK'i tt.t un 

 ^fir 6* Sttrj'rwc 

 Trawl or dredjfn 



Cor. -£> 

 Dri/t 



rf f SOUNDIN G WIRE . 











Jfl- i 







■ 



U • 





u 





0 

 100 



300 



700 



Boo 

 900 

 IQ0Q 

 1100 

 mo 

 LjQCi 



MOO 

 iftcio 



1700 

 ifko 



1000 



3 10O 

 3300 

 2^00 

 340TI 



DREDGE ROPE 



MOWN. 



» Hi 



