A group of Navy submariners were taking naked videos of their female colleagues without consent and trading the images  "like Pokemon (cards)," according to CBS News.

One of the sailors would shoot illicit cellphone videos of the victims entering and exiting the showers, and then tell other sailors he had a "gift." They would trade images by bumping the phones together, which allows file transfer in some phones. The videos were not uploaded to the Internet, CBS News reports.

Navy Vice Adm. Michael Connor, commander of the U.S. submarine fleet, called the case a "serious sexual offense."

The Navy has only had coed submarine crews since 2011. The USS Wyoming, on which the video-trading ring took place, was one of the first submarines to have female sailors.

The defense attorney said the videos were of such poor quality that they could not be considered graphic, and they were never posted online.

"At no point can you ever see a full length view of the person. ... You might see a face ... then a leg ... or a butt ... but there is no full length view," Lt. Paul Hochmuth said.

CBS News has the full story.