Submission + - DARPA release requirements for drone launching drone submarine Hydra (suasnews.com)
The UAV payload will feature encapsulated air vehicles that fit into the standard Hydra modular enclosure. The air vehicle payload that will be ejected from the mothership, float to the surface, launch, fly a minimum range, and conduct several different types of missions.
Undersea payloads will launch, dock, and recharge from the mothership and collect intelligence information. After their missions they will download information to the mothership, which will communicate it to command authorities.