Which statement best describes Passive guidance?

Which statement best describes Passive guidance?

• A. It uses GPS and accelerometer
• B. It requires a fire control radar to illuminate the target
• C. It detects heat, light, and RF energy with a receiver
• D. It contains transmitter and receiver

Answer: (C)

Passive guidance relies on the seeker not emitting energy; it only receives energy that comes from the target or the surroundings. The best description is that it detects heat, light, and RF energy with a receiver, because the system listens for energy already present rather than projecting energy of its own to find the target. This contrasts with options that depend on external illumination or on emitting signals themselves—such as using signals from satellites, relying on a fire-control radar to light up the target, or having a transmitter onboard—none of which fit the idea of a passive, energy-receiving seeker.

Passive guidance relies on the seeker not emitting energy; it only receives energy that comes from the target or the surroundings. The best description is that it detects heat, light, and RF energy with a receiver, because the system listens for energy already present rather than projecting energy of its own to find the target. This contrasts with options that depend on external illumination or on emitting signals themselves—such as using signals from satellites, relying on a fire-control radar to light up the target, or having a transmitter onboard—none of which fit the idea of a passive, energy-receiving seeker.