There is only one way for the rear of your spaceship, thus the whole of your spaceship -- as a whole (or any whole object), to continue to exist unitarily while speeding through space-time. That is tachyons (that is quantum convertibility -- or space-time maintenance -- on the fly). As a traveler, it's how you see the space-time past (-) as always developing to your rear as you go forward into space-time futures (+). Anything that moves in the universe is kept whole (all other things being equal, so to speak) via particle-tachyon | tachyon-particle convertibility instantly on the spot. The traveler, whatever the object, would have no sense (no realization) of what is occurring (again, all other things being equal). Each and every point of it being always maintained as the exact center point of infinity (centered in the horizon (t=0) between the horizons (t=1)).
Well, anyway, each and every so-called sub-light particle is its own hyper-light tachyon.
The illustrated space cones in the article don't work as illustrated in the article or any other article that illustration appears in. It's almost laughable since the flow of space-time (pasts (-) > futures (+)) (pasts and/or futures) is always to the foreground's observer (to Now (t=0 (constant!))), including travelers, from infinity's background horizon (t=1), and never away from either as the arrows of time in the illustration point. The only observable universe is the past (-) always oncoming to the observer (t=0) via future (+). As many people have said, "the future is Now" (t=0), the only constancy other than infinity's constant (t=1).
You want to time travel the past, take to space and jump into one of those space-time past corridors . . . and find yourself traveling a future path through it to a destination that is always dark universe stuff until you (A) arrive at point B Now (t=0) from point A Now (t=0). Neither one being observable universe, your only observables being pasts-futures flowing like streams to you from every point on the compass. Then you're talking tachyons, particularly as the observable universe .to the rear flows to you as a growing, ever more distant, past (a past universe always oncoming to you even as flows away into the past). Mars at its closest orbital position to Earth is observed to be (-)3.03 minutes, or about a (-)182 seconds, from Earth. Dark universe stuff Mars is (+)3.03 minutes ((+) 182 seconds) to that (-)3.03 minutes. And it is not the former (-) the traveler travels to but to the latter (t=0) from the observable former (-) via the (+) space-time path. Like quantum entangled particles, the three t=0 reside in one field of dark universe until two reals (traveler A (t=0) and Mars B (t=0) (Earth A (t=0) then being in the direction of infinity (t=1) or traveler A (t=0) and Earth B (t=0) (Mars A (t=0) then being in the direction of infinity (t=1)) merge, so to speak.
Since the traveler above, if he could, would measure the speed of light incoming from every point of the space-time compass to be exactly the same speed of light as every other point of incoming, it means he is dealing in sub-light speed particle / hyper-light speed tachyon convertibility and compatibility in every direction of the compass. It could be said, and rightly so, that the traveler is traveling more dimensions than he started with (that he has risen to and is traveling a hyper space-time dimensionality).
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It's a Multiverse Universe.