MIRROR (3"DIA ,I.5"F.L.) 



DETECTOR (THERMISTOR BOLOMETER) 



MIRROR CHOPPER 



THERMOSTATED REFERENCE 

 BLACK BODY 



ABSOLUTE TEMPERATURE ERROR 

 DEPENDS ON ALTITUDE 



SENSITIVITY >0.1° 



BAL. AMP — RECORDER 



POWER SUPPLY 



FIGURE 



AIRBORNE RADIATION THERMOMETER 



Airplanes have great speed and transport type airplanes have 

 ample space for equipment, but unfortunately there just are not 

 many types of oceanogr aphic mstrumients available today for use in 

 aircraft. An excellent example of one of the instruments that does 

 exist is the airborne radiation thermiometer for measuring surface 

 temperatures (fig. 15. I). The radiation thermiometer comipares 

 the difference in temiperature between a self-contained standard 

 temperature reference and the ocean surface. By using the new 

 thermo-electric heating and cooling devices, the radiation thermo- 

 meter might be made miuch simpler and more usable than earlier 

 models that depended on thermos bottles with ice cubes in them 

 which had to be renewed at awkward intervals. Simplifications 

 of this type might result in much wider use of airborne thermo- 

 meters. 



Concerning UNDERSEA VEHICLES, let us start with the deep- 

 running torpedo which has already been mentioned. One of the 

 assuring things about torpedoes is that we have considerable know- 

 ledge and experience with their hydrodynamics, propulsion, noise, 



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