But in the moments when the camera is at rest while the operator is trying to focus, the ocean is moving slowly in the opposite direction as the object, meaning

But in the moments when the camera is at rest while the operator is trying to focus, the ocean is moving slowly in the opposite direction as the object, meaning that the jet is flying in the same direction as the object. If the object were static, then upon lock-on, the ocean in the background would slow down or reverse direction. What we see instead is that the ocean background speeds up, meaning the object is traveling faster than the jet in the direction the jet is going.