Execute on Instagram: "The new Navy‑bound Manta Ray is an extra‑large, autonomous underwater drone developed by DARPA and built by Northrop Grumman, designed for long‑range, long‑endurance missions. Inspired by the manta ray’s wing-like glide, it uses buoyancy‑driven propulsion paired with propellers and control surfaces—allowing it to “glide” through the ocean at low power > @execute"