The Mon Calamari Central Planetary Scanner was used on the planet Dac as the primary planet wide sensor grid. The device was capable of detecting movement across Dac's watery surface.
Anakin Skywalker was able to destroy an underwater Planetary Scanner using the Force. His goal was to prevent the Separatists from detecting the Republic ship that would soon arrive, but it instead warned them of the imminent attack.
- Gungan Attack (First appearance)