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FLB-250 is an air launched ground penetrating antenna developed to cover the need for non-contact antennas in applications where full contact is not possible. The implemented antenna design makes the emitted footprint as narrow as possible, allowing for better transition of the EM wave energy into the material under survey. FLB-250 has been optimized to offer a good front to back ratio to allow for operation in urban environments. However, its primary application is for geology survey in very rough terrain where the use of ground coupled antenna may be prohibitive or in the fast acquisition road surveys.

FLB-250 has been successfully combined with HA-1000 or HA-2000 horn antennas. This allows the gathering of information about the deeper layers of the road in one pass together with the shallower road information provided from the horn antennas