Name two target tracking options of the GBU-53's multi-mode seeker.

• A. Imaging infrared and semi-active laser targeting
• B. GPS-based guidance with inertial lock
• C. Infrared imaging with radar
• D. Passive infrared and optical tracking

Answer: (A)

The GBU-53/B uses a multi-mode seeker that can track targets in several ways, giving it flexibility in different conditions. Two of the tracking options it employs are imaging infrared and semi-active laser targeting. Imaging infrared relies on the target’s heat signature to locate and follow it, allowing autonomous tracking even when visibility is poor. Semi-active laser targeting uses laser energy reflected from a designator on or near the target; the seeker homes in on that reflected energy to lock onto and track the target. The system also includes a third mode (active radar) for tracking when laser designation isn’t available, but the two options highlighted here are the imaging infrared and the semi-active laser modes.