Check out this video of Boston Engineering’s Advanced System Group testing GhostSwimmer, the latest in a burgeoning fleet of unmanned underwater vehicles built for the Navy.

The 5-foot long, 100 pound drone relies on movements similar to a tuna to glide through water anywhere from 10 inches to 300 feet deep and the end result is pretty shark-like in appearance. GhostSwimmer joins Project Silent NEMO, and its ultimate use will likely be intelligence, surveillance, and reconnaissance missions in hostile waters. For now, GhostSwimmer is sticking to gathering geological data and weather information.

Check it out in action here: