U. S. Industry. 

 Relative Importance to U« S. National Oceanographic Program: 

 Individual instrument/equipment priority 7. 



I.h. MARINE ELECTRON RESONANCE MAGNETOMETER 



Primary Use: 



To be utilized on oceanographic survey ships for the purpose 

 of obtaining continuous profiles of the earth's total magnetic inten- 

 sity. 



Requirements and Specifications: 



a. To be designed primarily for underway operations and 

 secondarily for stopped operations. 



b. To perform reliably at ship's speeds of 0-15 knots in sea 

 states of through 5. 



c. To be designed with emphasis on simplicity, ruggedness, 

 compactness, and minimum maintenance requirements. 



d. To be designed primarily for survey type of operations with 

 primary emphasis on installation in the survey surface ship, but 

 with consideration of and possible application to survey use from 

 aircraft. 



e. Sensors: 



Data 



(1) Total magnetic intensity 



(2) Depth of sensor below 

 surface of water 



Range: 20, 000-100, 000 gammas 

 Accuracy: iO.Ol gamma 

 Range: Underway Mode: 



0-1, 000 feet 

 Accuracy : Underway Mode: 



±1/4% full scale 

 Range: Lying -to Mode: 



0-6, 500 fathoms 



373 



