measures between and 30 degrees centigrade, while the 

 fine mode presents with greater accuracy any 10 degree 

 section of this wide range selected by the operator. The 

 water temperature is sensed by a small element attached 

 to the outside of the sphere near the observation window. 



Oxygen Content of Sea Water 



Oxygen content may be read directly from the panel 

 containing the 2 -CO s indicator. The system is equipped 

 with an external sensor located near the sphere window. 



Tape Recording 



The sphere may be fitted with a 22 -channel FM type 

 tape recorder that was developed for use in TRIESTE. 

 While this recorder is not presently mounted, it may be 

 put in at times when additional data- gathering facilities 

 are required. Also, voice tape recording may be accom- 

 plished through the use of a small portable recorder that 

 is normally used to record the pilot's log during the course 

 of a dive. This tape provides the basic information for 

 preparing the report of the dive upon completion. A 

 portable dictaphone is available for the use of the scientific 

 observer in recording his data. 



Current Measuring Equipment 



This system permits measurement of horizontal direc- 

 tion and velocity and vertical velocity of current flow. 

 Accuracy is to 1/100 knot. Recording is through a pen 

 recorder. 



Plankton Sampler 



This externally mounted unit can collect up to 10 samples 

 on 4-inch-diameter screen disks. Control is through push- 

 buttons in the sphere. 



Depth Recording 



The pressure transducers provide depth inputs to the 

 Varian dual-pen recorder, which also usually records the 

 temperature trace. 



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