A bolt lock device comprising: a bolt member comprising an electrically conductive medium running between a first end of the bolt member and a second end of the bolt member through a substantially axially central portion of the bolt member, the conductive medium being electrically insulated from the bolt member along the axial length of the bolt member, except at the second end of the bolt member, with an electrically insulated core of a predetermined diameter; and a receiving member comprising a structure for receiving the first end of the bolt member, and a battery-operated sensory circuit with memory and pins , wherein the bolt member and the receiving member form an electrically conductive pathway through the conductive medium of the bolt member after the first end of the bolt member has been inserted into the receiving member; wherein the sensory circuit operates to store a unique identifier associated with the bolt lock device and detect whether the sensory circuit has been opened or shorted, characterised in that the sensory circuit further operates to: record in the memory the date and time that the sensory circuit was opened or shorted, and transmit the date and time indicating when the sensory circuit was opened or shorted to a reader when the sensory circuit is interrogated by the reader; periodically receive and store data related to multiple transit locations and/or multiple handling parties of a container locked using the bolt lock device to create a location log and date-stamp; and transmit the identifier and the location log and date-stamp in response to the interrogation. a bolt member comprising an electrically conductive medium running between a first end of the bolt member and a second end of the bolt member through a substantially axially central portion of the bolt member, the conductive medium being electrically insulated from the bolt member along the axial length of the bolt member, except at the second end of the bolt member, with an electrically insulated core of a predetermined diameter; and a receiving member comprising a structure for receiving the first end of the bolt member, and a battery-operated sensory circuit with memory and pins , wherein the bolt member and the receiving member form an electrically conductive pathway through the conductive medium of the bolt member after the first end of the bolt member has been inserted into the receiving member; wherein the sensory circuit operates to store a unique identifier associated with the bolt lock device and detect whether the sensory circuit has been opened or shorted, characterised in that the sensory circuit further operates to: record in the memory the date and time that the sensory circuit was opened or shorted, and transmit the date and time indicating when the sensory circuit was opened or shorted to a reader when the sensory circuit is interrogated by the reader; periodically receive and store data related to multiple transit locations and/or multiple handling parties of a container locked using the bolt lock device to create a location log and date-stamp; and transmit the identifier and the location log and date-stamp in response to the interrogation. record in the memory the date and time that the sensory circuit was opened or shorted, and transmit the date and time indicating when the sensory circuit was opened or shorted to a reader when the sensory circuit is interrogated by the reader; periodically receive and store data related to multiple transit locations and/or multiple handling parties of a container locked using the bolt lock device to create a location log and date-stamp; and transmit the identifier and the location log and date-stamp in response to the interrogation. <EOS>