I’ve blogged before about how there are patents, dirigibles, and other man-made craft that may easily be mis-identified as alien spacecraft. Here’s a fascinating article (I found it via the Giza Death Star blog by Joseph Farrell) on the Navy’s patent.  You’ll love the diagrams! Here’s how the article opens:

The US Navy has been granted a patent for an advanced aircraft which resembles a flying saucer UFO. Military inventors filed plans for a highly unusual flying machine which uses an ‘inertial mass reduction device’ to travel at ‘extreme speeds’. What that means is that the aircraft uses complex technology to reduce its mass and thereby lessen inertia (an object’s resistance to motion) so it can zoom along at high velocities. The patent is highly complex and describes methods of reducing the mass of an aircraft using various techniques including the generation of gravity waves, which were first detected in 2016 after being produced when two black holes collided.