Geophysical Mapping: Problem Details Problem Name: Weapon Problem Type: Forsenic Investigations Assigned Methods: + Airborne magnetics Magnetic Methods + Ground magnetics Magnetic Methods + Ground penetrating radar (surface-based) Electromagnetic Methods + Ground penetrating radar - Borehole tomography Electromagnetic Methods + Time-domain electromagnetics - Profiling Electromagnetic Methods + Time-domain electromagnetics - Sounding Electromagnetic Methods 0 Frequency-domain electromagnetics - Profiling Electromagnetic Methods 0 Frequency-domain electromagnetics - Sounding Electromagnetic Methods    '+' = Technique applicable; '0' = Application possible/limited use