A system for targeting an operation site includes an identifier having an electromagnetic field generator configured to produce electromagnetic fields. The system includes an implement that includes a handle, a blade portion, and an electromagnetic field sensor coupled to the blade portion. The electromagnetic field sensor is configured to produce a signal responsive to electromagnetic fields produced by the electromagnetic field generator. The system includes a control unit configured to access information indicating a position of the electromagnetic field sensor relative to the operation site, receive a signal from the electromagnetic field sensor that is indicative of a position of a tool relative to the electromagnetic field sensor, and determine a position of the tool relative to an operation site based on the received signal and the position of the electromagnetic field sensor relative to the operation site.
