The trace method is also known as what?

• A. Passive Location
• B. Active Location
• C. Magnetic Tracing
• D. Ground Penetration Detection

Answer: (B)

The trace method involves actively injecting a signal into the underground utility so you can follow it with a locator. That active signaling is why this method is known as Active Location. In practice, you connect a transmitter to the line or use a tracer wire, and the receiver detects the energized path to guide you along the route, giving you the location (and often the depth) of the utility. This approach is distinct from passive location, which relies on signals already present on the conductor without introducing a new signal, and from other terms like Magnetic Tracing or Ground Penetration Detection, which refer to different techniques or focuses.