given and for those stations the approximate position of the berg nia\- 

 be taken as 52°18 ' N., 54°35 ' W., and the approximate depth of water 

 220 meters. For these stations the dynamic heights are referred to the 

 140-decibar surface. For stations 3345 to 3539 the dynamic heights are 

 referred to the l.OOO-decibar surface and the depth of water is the 

 uncorrected fathometer sounding based on a sounding velocity of 

 1,500 meters per second. For stations 3552 to 3575 the dynamic heights 

 are referred to the 2,000-decibar surface and the depth of water is the 

 sonic sounding corrected for sounding velocity and draft but not for 

 slope. Where the depths of the scaled values are enclosed in paren- 

 theses, the data are based on extrapolated vertical distribution curves 

 of temperature or salinity or both. Asterisks appearing before observed 

 temperatures indicate that these temperatures were determined from 

 the depth of reversal and the corrected reading of an unprotected 

 thermometer. The symbol a, signifies 1,000 (density — 1) at atmos- 

 pheric pressure and temperature /. 



35 



