MARINE ELECTRON RESONANCE MAGNETOMETER 
Sketche 
(To be provided) 
Primary Uses 
To be utilized on oceanographic survey ships for the purpose of 
obtaining continuous profiles of the earth's total magnetic intensity. 
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 O through 5. 
c. To be designed with emphasis on simplicity, ruggedness, compact- 
ness, 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. Sensorss 
Data Range Accuracy 
(1) Total magnetic intensity 20,000-100,000 gammas +0.01 gamma 
(2) Depth of sensor below surface Underway Mode: tz% full scale 
of water O - 1,000 feet 
Lying-to Modes +7% full scale 
O - 6,500 fathoms 
The depth sensor modules should be interchangeable. 
f. Data recording and Read-outs 
{1) Visual analog at the instrument. 
(2) Data from this instrument must be an input into the Master 
Shipboard Data Logging and Processing System. 
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