The City of Chester's Police and Fire Departments are using new technology for search and recovery missions.
They're among the first departments in the Commonwealth to have their own underwater robot.
Chester Fire Captain Kevin Postlewait went through training with the state-of-the-art robot he says will make his job as a diver easier.
"Our plan is to use it for recovery of weapons, vehicles, people," Postlewait said.
The 40-pound submersible has lights and arms that can grab objects and a remote control camera.
Postlewait uses a joystick to move the device as he tries to pick up a pair of milk crates placed in the Springton Reservoir for practice.
"With the sonar, we can, I believe, reach out to about 300 feet, which you will never be able to see with our own eyes underwater, so it will make a drastic difference in visual sight," Postlewait said.