The story gets more convoluted. It appears the Navy "blimp" is being operated by the Army.

"By using the airship[,] the Army will be able evaluate the performance of current and future sensor payloads," Pollachek said. "The total length of time that the system will spend at APG has not been established yet."

The office in charge of the blimp is part of the Army's C4ISR division, which underwent a major expansion after BRAC.


Navy blimp flies over Aberdeen - baltimoresun.com