That Starbase 11 wall chart - noe in slide form

[BK613]

Presumably, Starbase 11 is the Enterprise's command base in the local sector, just like Starbase 12 was in Space Seed. Whether that is a permanent assignment or a transitional one where oversight is transferred as the Enterprise moves between sectors carrying out her mission, IDK.
(Homeported in Oakland, we would move from 3rd to 7th fleet whenever we deployed to the Indian Ocean. And back to 3rd when we returned to the States. Didn't really change what we were doing but it did move the lines of communication and responsibility closer to where we actually were.)

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In my headcanon, 1718 is a new build (perhaps still under construction) and not part of The Twelve, reducing the number to three at the Starbase.

 

[Nerys Myk]

Are we assuming that the ships on the chart represent ships are among the 12 that are like the Enterprise?

 

[BK613]

Are we assuming that the ships on the chart represent ships are among the 12 that are like the Enterprise?

The recent discussion was that Okuda pulling a Jein and making all of them Connies was silly—it put ten of the twelve at the base—and therefore maybe only the 17xx were.

 

[Dukhat]

Are we assuming that the ships on the chart represent ships are among the 12 that are like the Enterprise?

I assumed the 17XX ships were, and the 16XX ships were the previous iteration of starship class.