https://www.youtube.com/watch?v=lKjaPq04eBo&feature=youtu.be
Swaruu explains how the starships navigate through space and time, the ones who travel below the speed of light and those above it. It explains the interstellar travel that is done using frequencies. In the second part, she goes into time travel and how it is achieved. EVERYTHING is achieved with the frequencies.
All in all, fascinating subjects!