No, I mean that they are placed into the ship in such a way that they can pivot, relative to the ship.
You can imagine it whatever way you wish...
True enough, I just think that all ships being able to rotate themselves at least as fast as your racial tracking speed is a very implausible explanation.
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I would not really disagree here... also one reason why I think that spinal mounted rail-guns would be rather impractical for the most part unless the ship it is mounted in is very small in comparison to the weapon itself. But I don't think it is completely impossible as the movement of the ship is not based on thrust it could possibly rotate completely freely without interfering with the drive mechanics in any way as the ships orientation might not have anything to do with its movement at all.