Huntington Ingalls Industries’ subsidiary Undersea Solutions Group (USG) has made history as its two female divers became the first women to crew and drive a dual-mode underwater vehicle (DMUV).

Chloe Mallet, an ocean engineer, and Andrea Raff, a mechanical engineer, crewed and operated USG’s Proteus.

Proteus weighs 8,240 pounds and is designed to operate as a manned swimmer delivery vehicle SDV or unmanned undersea vehicle UUV. It can be used for integrating and testing payloads, transporting and installing equipment on the sea floor, inspecting undersea infrastructure, and transporting a team of combat swimmers and cargo.

Mallet and Raff have undergone extensive training with Proteus and assist with its maintenance. To prepare for operating the vehicle, the women trained in the company’s test tank and supported pre-and post-dives with USG’s more experienced pilots.

Mallet and Raff individually took Proteus out and co-piloted it in Florida’s Saint Andrews Bay with USG Vice President Ross Lindman as the pilot.

“The opportunity to jump in is exciting,” Mallet said. “We help with maintenance on the boat and learn as we go when it’s in the maintenance bay at the port, but this was the first time ever in the water. We’ll continue training as co-pilots and then pilot it with an experienced diver.”

Mallet and Raff are the only two women on USG’s seven-person dive team that works with Proteus. When in use in the manned mode, the vehicle is flooded with water and can submerge to depths up to 150 feet.

“I felt prepared, but it was still different than I thought it was going to be,” Raff said. “It’s pitch black inside, and all you can see is the computer screen and the buttons. We have testing for customers scheduled so it’ll be exciting to see how Proteus operates in the future with our customers.”