Water 



Color Code Color acrording to Forel-Ule scale. 



Trans Transparency in whole meters as determined by Secclii disc. 



Wind 



Dir Rounded to nearest multiple of 10 degrees. 



Speed Letter S indicates wind speed in knots. 



Barometer Barometric pressure given in tens, units and tenths of millibars. 



Air Temp. °C Air temperature to tenths of a degree Celsius. 



Vis. Code Visibility according to WMO Code 4300. 



No. obs. depths Number of observed levels associated with the station. 



Messenger time Entered in hours and tenths of an hour GMT. For Nansen casts, indicates time of release 



of messenger applicable to the observational level. For STD casts, indicates the starting 

 time of lowering the sensor. 



Card type OBS designates observed levels. STD indicates the values at this standard level were 



interpolated by a modified 3-point LaGrange formula. 



Depth (m) Depth to nearest meter. A postscript T indicates depth was obtained thermometrically; 



Z indicates uncorrected "wire out" depth. Postscript Q indicates value was marked 

 doubtful by originator; P indicates value was considered doubtful by NODC. Postscripts 

 P and Q retain this meaning throughout the following entries. 



T C Temperature to hinidredths of a degree Celsius. 



S /. Salinity in parls-per-lhousand. 



SIGMA-T Entered tu hundredths. 



Specific-volume Multiply entry by 10^' to obtain specific-volume anomalv in cubic centimeters per gram. 



SAD Dyn. M X 10^ Multiply entry by 10 '^ to obtain anomaly of dynamic depth in dynamic meters referenced 



to the sea surface. 



Sound Velocity Sound velocity according to Wilson's formula entered to tenths of a meter per second. 



