Does anyone notice how the object goes through the water?

You know that the helicopter that was doing the filming was probably around 1000 feet off the ground, give or take. Things that go 600 miles per hour are most likely not going to be flying lower than helicopters. And the thing looked like it was really motoring, but 600 miles an hour? JSDF has dark color schemes for its blackhawks

I wouldn't expect a camera to be able to resolve that kind of color from that distance to something moving so quickly as to anything except for a dark splotch. They can motor along at ~150 knots, so that seemed like a logical speed from that distance. The problem with judging its speed is that you have no idea of its actual direction, only of its perceived direction. Relativity is a bitch.

And I'm sorry, I don't care how good of a pilot your friend is, you don't have depth perception in the video, so he can't accurately judge how far it moved.

By the way your friend really has no way of knowing the distance it flew. There's no way to even make an estimate.

@diehardbrownsfan said:

Your friend is wrong. It's a helicopter.

Nope you are wrong. The video was taken down.

@kosar_for_president said:

No it is not a helicopter. A pilot I know estimated the object was flying at 600 mph, give or take, based on distance estimated traveled and time. There is no known helicopter that fast.

Your friend is wrong. It's a helicopter.