Concerned that it might lose track of where mines are buried, the Army is looking for ways to keep tabs on them that don’t involve GPS. The Army wants geolocation technology that will track weapons until they are retrieved or neutralized, according to a research proposal

Read the proposal.

The desired system will be able to transmit the location of detected mines to a host station up to 10 kilometers away, according to the proposal. It will consume minimal power, and should measure less than one cubic inch.