Looking-Glass Approach
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I was just reminded of "Through the Looking Glass", a scene in which if you approached someone, he got farther from you. Trying to chase an FTL spacecraft has a Looking-Glass aspect, as I discovered while equation-crunching and number-crunching for my story.
FTL0476 was moving away from the solar system at 2c. (The solar system is considered stationary.) If you are stationary, she recedes from you at 2c.
If you chase her at 100 miles/s, she goes further away from you faster -- specifically at 2c + 300 mi/s.
If you chase her at 1000 miles/s, she recedes faster from you at 2c + 3000 mi/s.
If you chase her at a notch under c/2, she recedes at almost infinite speed. If you chase her at a notch over c/2, she now approaches you at almost infinite speed. Now, the faster you go toward her, the slower she comes toward you. I got lucky: a routine speed I use (V = 4c/5) has FTL0476 approaching you at 2c -- precisely the speed she recedes from the solar system.
PS. Can anyone figure out what caused that first pair of signs (Green/Yellow Alert)?