Can anyone tell me what the last chevron does?
On the Stargate there are 9 chevrons. The first 6 aare used to plot a course (3 dimensional space, 2 markers used to plot X Y and Z), the 7th is used to mark the point of origin and the 8th is used as a calculation for distance for long wormholes.
So what does the 9th Chevron do?
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