Bathythermograph Card : 

 Bathythermograph Curve : 



Bathythermograph Data: 

 Bathythermograph Grid: 



Bathythermograph Profile: 

 Bathythermograph Slide : 



Bathythermograph Unit: 

 Bathythermography : 

 Blotches: 



BT: 



BTgm: 



Bucket Temperature: 



A Bathythermogram. 



Trace made on a Bathythermograph smoked slide by the pen 

 arm. Represents change of temperature with change of depth. 



Data in the form of temperature values, depth values, slope 

 of temperature-depth trace, and points of inflection v^^hich 

 are obtained from Bathythermograms. 



Graph lines, the abscissas of which represent line of con- 

 stant depth, and the ordinates of which represent lines of 

 constant temperature, photographed on a photo-sensitive glass 

 slide and mounted in a viewer. Purpose of the grid is to 

 translate directly the Bathythermograph curve into quan- 

 titative values of temperature and depth. 



See Profile, Bathythermograph. 



Smoked glass slide on which the Bathythermograph trace 

 is drawn by the pen arm. 



A Bathythermograph; a Bathythermograph instrument. 



The art of taking, analyzing, and utilizing Bathythermographs. 



Marks left on BT slide by sporadic movement of the pen arm, 

 usually caused by a sudden shock to the BT itself. Marks 

 resemble jagged lines or ink spots. 



Abbreviation for Bathythermograph. 



Abbreviation for Bathythermogram. 



See Temperature, Bucket. 



Characteristic Shape: 



Component of Error: 



Consistency: 

 Correction Factor: 



DCS: 



The term refers to the BT trace, and specifies the general 

 overall appearance of the curve. Since the BT trace often 

 represents a typical ocean condition, this ocean condition is 

 recognized by the "characteristic shape" of the Bathy- 

 thermogram. 



In formulating an average BTgm, it is most important to 

 maintain the characteristic shape of the individual BTgms. 



That individual error which stems from a distinct source, 

 this error being one in a group of errors, each emanating 

 from a distinct source, which together produce the overall 

 error. 



Regularity with which the data seem to fit the particular 

 conditions. 



The numerical value which is added to or subtracted from 

 the location of the BT slide with respect to the BT grid to 

 correct for the determinate errors or sets of the Bathy- 

 thermograph. 



Average difference between the depth trace of the slide 

 and the surface line (0 feet) of the reading grid. If the 

 depth trace is above the zero foot line, the DCS is plus. 



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