Sensor 



Barometric pressure 



Relative humidity 



Range: 950 to 1, 050 millibar s 

 Accuracy: * 0.1 millibar 



Range: to 100% 

 Accuracy: ± 5% 



Surface wind: speed 



direction 



Range: to 200 knots 



to 360° 

 Accuracy: ±0.5 knot 

 ±5° 



Radiation: incident 



reflected 



Range: to 40 Langleys /minute 

 Accuracy: ± 5% overall range 

 Range: to lOO (U. S. Weather 



Bureau special scale) 

 Accuracy: ± 5% overall range 



(6) Magnetometer 



Range: 20, 000 to 100,000 gammas 

 Accuracy: *0.0l gamma 



(7) Wave Meter 



Range: to 40 feet 

 Accuracy: ±0.5 foot 



f. Modular construction should be used throughout the system 

 to: (1) facilitate maintenance and repair, and (2) to permit special 

 "tailor-made" assembling of sensors and recorders in order to 

 augment the particular ship's existing instrumentation (such as in 

 the case of fleet units which are already partially equipped). 



g. The recording of all data should be automatic insofar as 

 possible. In addition, data readout and recording should be in such 

 form that it can be a direct input into the archives of the National 

 Oceanographic Data Center. 



Potential Users and Estimated Number of Units Which They May 

 Require : 



a. U. S. Navy - 25 to lOO 



b. U. S. Air Force Ocean Range Vessels - 4 to 8 



c. MSTS and U. S. Merchant Marine - 25 to 50 



407 



