Did anyone else notice the boost info card in with the hounds tooth. I'm guessing it gains the boost action from that maneuver upgrade card next to the ion something's.
As someone pointed out, the ship already comes with an Engine Upgrade.
Note that the card is YV-666 only. That indicates that it exists specifically to either mitigate a unique drawback of the YV or enhance a unique benefit of the YV.
My suspicion is that the ship has an absolutely pathetic dial, and the "Maneuver (Whatever)" card is a way to help it get around.
Here's my prediction (legible words in the photo are bolded):
Maneuvering F(ins)
YV-666 (Only)
When (you reveal a)
maneuver (you may)
increase (its speed)
by 1 (total? Not sure what word fits here best)
So perhaps it has the game's worst dial... like... 1 banks, 1+2 straight, and that's all. No hard turns (but the 180 degree arc to compensate). Use the Maneuvering Fins to add 2 banks and a 3 straight.