Which of these items would be useful for a hidden transmitter hunt?

A hidden transmitter hunt, frequently referred to as a 'fox hunt,' is an activity where operators use radio direction finding techniques to locate a hidden signal source. A directional antenna, such as a Yagi or a loop antenna, is critical for this because it allows the operator to pinpoint the direction from which the strongest signal is arriving. The distractors are incorrect because they relate to measuring equipment inside a radio station. Calibrated SWR meters and directional wattmeters are used to measure forward and reflected power inside a coaxial cable, offering absolutely no help in tracking a signal through the air.