Rush theorized that the ninth chevron was used to lock onto moving targets though.
"The universe is big, its vast and complicated, and ridiculous. And sometimes, very rarely, impossible things just happen and we call them miracles. And that's the theory. Nine hundred years, never seen one yet, but this would do me. (The Doctor)"
â€” Steven Moffat
The Ninth Chevron idea of it tracking doesn't make sense given stargates don't jump connections at least not safely. if the Gate was to move it would leave a location causing it to cut out. Because it would have left the location it was originally.
Would it not make more sense for it to be a further extension given the sheer number of planets, moons, dwarf planets, asteroids. So rather it's to dial between the clusters.
This would make sense given MilkyWay and Pegasus are in the Local group. Thus only an 8 digit address is needed.
123456-Point of origin-Galaxy(In this galaxies same group)-Cluster(To jump between groups)
I'm not saying that it's not possible for them to not assign a gate location for some reason (maybe they didn't chart a cluster for them to assign it, maybe they keep one aside for use later maybe like 555 is used in US films) and assign that to a special program in all the DhDs for certain ships. So that it scans through the network until it gets a gate that is identified as Destiny gate. Then opens the gate between here a destiny.
Maybe to dial 9 chevrons it requires this special planet energy. Possibly even the Subspace ZPM thingy (The One that Mckay couldn't make work, Blew up a solar system trying) Or a different power source.
I just don't think it makes much sense to use the 9th chevron given the sheer number of gates. if it's used to track a moving gate.
Mckay said in Adrift (4x01) that to use a Stargate it must remain in a small area space, when anyone dials Destiny she drops to sub-lights, maybe even stops completely to allow the transfer to take place. The ninth chevron is just a range and location finder for the Destiny gate, as Destiny doesnt move very far when her stargate is being used for either incoming or outgoing wormholes, she doesnt leave the small area of space which the current dial-in address correlates to.The Ninth Chevron idea of it tracking doesn't make sense given stargates don't jump connections at least not safely. if the Gate was to move it would leave a location causing it to cut out. Because it would have left the location it was originally.
Or the ninth chevron is a signal to Destiny to drop out of FTL and remain stationary to facilitate transfer.
But compared to FTL, they are moving very slowly. Even so, the DHDs have to update the coordinates every several hundred years or so (Avenger 2.0). The ninth cheveron could be thought of a command to do an instant correlative update, or more accurately, an integral of a correlative update (it updates âˆ†position/âˆ†t).
The signature has been destroyed!
I never thought of it like that