Abstract: An asset tracking device and method for detecting the presence of an intermodal shipping container and responsively selecting a preferred location determination. The device may include a controller, a sensor coupled to the controller, a global navigation satellite system chip, and a cellular signal transceiver. While not detecting a container, the controller obtains location data via a global satellite system chip. While a container is detected, the sensor sends a detection signal to the controller and, responsive to the detection signal, the controller obtains location data from a cellular signal transceiver and not from the global satellite system chip.