In order to salvage any Ore Collectors that have been infected by Terror Drones, you must send them to your War Factory (Allies), Mecha Bay (Empire), or Crusher Crane (Soviets - late game).
The salvage operation kicked off at 9 a. m. when a huge crane began lifting a steel basket containing the 30-meter-long vessel, dubbed the Nanhai No. 1, or "South China Sea No. 1".