jwrr 



noHom ^ nrvu 



iJottom temperature ♦ *f # iT" 



J^o. of thtt^mometcr sT^y* ^ f 

 Corrttoled temperature 

 Air t^urface 

 Trawl or dredjfe 



Meet. 



Otr, 



Drift 



aOUNDtNG WIRE. 



'itTRJU. 



JCXl 



7<v. 



KlYr 

 IIOQ 



DRCDQfe ROPE- 



