Figure 23. Horizontal gradient recorded on long magnetic line 

 number 4. X-axis represents State Plane 

 coordinate 41 



Figure 24. Horizontal gradient recorded on long magnetic line 

 number 5. X-axis represents State Plane 

 coordinate 42 



Figure 25. Horizontal gradient recorded on long magnetic traverse 

 number 6. X-axis represents State Plane 

 coordinate 43 



Figure 26. Horizontal gradient recorded on long magnetic traverse 

 number 7. X-axis represents State Plane 

 coordinate 44 



Figure 27. Altitude of V-fin and magnetometers on 



magnetic line 1, survey line 1 45 



Figure 28. Anomaly strength (peak signal magnitude) 



of 100 samples selected from the north-south 



magnetometer lines. (Plot provided by AETC) 46 



Figure 29. Cross-track locations, 100 analyzed samples. Shaded 

 area indicates computed detection range of array 

 used in the field. (Plot provided by AETC) 46 



Figure 30. Computed depth from seafloor to center of objects. 

 Negative values correspond to dipole fits where the 

 center of object is above the bottom. Most objects are 

 lying on the seafloor. (Plot provided by AETC) 47 



Figure 31 . Distribution of apparent sizes of the 100 test 



objects. (Plot provided by AETC) 47 



Figure 32. Distribution of sizes of ordnance recovered 



during 24-hr test raking operation 48 



