Abstract: Devices and systems for noninvasively and nondestructively sensing a signal in an electrical outdoor device, such a fishing transponder, are described. The device can include a first electrical connection to connect to a port on a main unit of an echo-location device, a second electrical connection to connect to a port on a transponder, the second electrical connection being in bi-directional electrical communication with the first connection to send a power signal from the main unit to the transponder and return an echoed signal to the main unit, and a third electrical connection to sense the signals between the first electrical connection and the second electrical connection. Positioning data is also created and stored with the signal data. The positioning data can be used to control acquisition of data. Systems and methods for processing the sensed data are described. Reports can be generated using the data and, in some reports with the positioning data.