Einstein
Dimensional Traveler
I don't think they were attempting time travel. Invisibility was the claimed goal that was being sought. If reports are true, teleportation is what took place. Try to look at the basic forces as being comprised of separate types of space. That would make the basic forces good candidates for extra dimensions. Think of those basic forces as being assembled in a way to produce our current reality. But apparently another way was found to assemble the basic forces. At the time, those forces being manipulated were gravity, time, electric, and magnetic.What I do not understand is how the entire ship got into an all of time raceway to where this ship came back or would show up in certain water reservoirs.A time machines based on this principle one would have to wear a special radiation suit.Maybe a modified version of a flux capacitor type of apparatus? Thank you, very interesting thought and thread.
Now if you're interested in time travel, I have an entirely different approach to achieve that.