EXPLANATION OF DATA PAGES 



GENERAL 



Each of the items appearing on the data pages is explained below. 

 The vertical arrows shown in some of the column headings indicate the 

 location of decimal points. The presence of an asterisk to the left 

 of the data indicates that data as doubtful, hence it was not used in 

 the construction of the curve from which the interpolated values 

 (standard depth values) were derived. Observed values which were 

 obvlo\jsly false were omitted entirely, 



SURFACE OBSERVATIONS 



1, Cmise Number , This number is arbitrarily assigned. It 

 identified the cruise and provides a means of sorting from the IBM 

 files all cards pertaining to that partic\alar cruise* Cruise number 

 OO50I1 was assigned to the USS ATKA (AQB-3) U. S. Navy Antarctic 

 Expedition 19^h'-19$^, In the present listing the first two zeros 

 are omitted, 



2, Station Number . Stations are numbered consecutively, 

 starting with one, at the beginning of each cruise. Therefore, 

 for a complete identification of a particular station, both cruise 

 and station number are necessary, 



3, Date , Month and day are given in Arabic numerals. The last 

 three figures of the year are indicated. The hour is Greenwich Mean 

 Time and is that hoTir nearest to the start of the first cast, 



k. Latitude and Longitude , The position of the station is 

 given in degrees and minutes, 



5, Sonic Depth , Sonic Depth is the uncorrected sounding for 

 the station, recorded in meters, 



6, Maximum Sanple Depth . The naxiraum depth from which a water 

 sample was obtained at the station is given to the nearest 100 meters. 



7, Wind , Wind speed is given in meters per second. Direction 

 from which the wind blows is coded in degrees true to the nearest ten 

 degrees. The last zero is omitted. North is 36 on this scale and 

 calm is 0, See Tables Defining Code Symbols - I, Conpass Direction 

 Conversion Table for Wind, Sea, and Swell Directions, 



8, Anemometer Height, The height of the anemometer above the 

 waterline is given in meters. 



Al 



