Figure 12. Example of horizontal magnetic gradient 

 recorded during calibration tests with 

 inert ordnance test targets, pass number 6 30 



Figure 13. Horizontal magnetic gradient recorded in 

 ordnance disposal area, magnetic line 16 

 (reference Figure 6) 31 



Figure 14. Horizontal magnetic gradient recorded in 



ordnance disposal area, magnetic line 17 32 



Figure 15. Horizontal magnetic gradient recorded in 



ordnance disposal area, magnetic line 21 33 



Figure 16. Horizontal magnetic gradient recorded in 



ordnance disposal area, magnetic line 19 34 



Figure 17. Altitude of V-fin and cesium-vapor 



magnetometers on magnetic line 19 35 



Figure 18. Plot of long magnetic traverses showing track 

 lines on left and zones of magnetic response on 

 the right. Scales are in feet measured from 

 arbitrary zero points - locations do cot represent 

 State Plane coordinates 36 



Figure 19. Horizontal gradient recorded on long magnetic 

 traverse number 8. X-axis represents State 

 Plane coordinate 37 



Figure 20. Horizontal gradient recorded on long magnetic line 

 number 1. X-axis represents State Plane 

 coordinate 38 



Figure 21. Horizontal gradient recorded on long magnetic line 

 number 2. X-axis represents State Plane 

 coordinate 39 



Figure 22. Horizontal gradient recorded on long magnetic line 

 number 3. X-axis represents State Plane 

 coordinate 40 



