Israel Aerospace Industries (IAI) has launched the BlueWhale System, a large and technologically advanced underwater drone.The BlueWhale drone measures 36 feet long, weighs 5.5 tons, and can remain submerged for up to 30 days.It is capable of discreetly tracking and gathering intelligence, as well as detecting other submarines and mapping mines on the seabed.The German Navy, in collaboration with NATO, recently launched a BlueWhale drone in the Baltic Sea for defense and surveillance purposes.