No, the same hex is withing the VCA/TCA. See the C3.2 exception, and this old official Q&A:
C3.2 & D1.81-.2, D8.5 Can a Gun fire in its own hex (i.e., is its own hex considered in its CA)? Do
the same principles apply to BMG/CMG?
A. Yes; except during the MPh if the hex is entered from outside the CA, when, even if the
moving target now expends MP for some other purpose (e.g., firing sD or stopping and unloading
Passengers), the Gun would still have to turn its CA to include the direction from which the hex
was entered, or if the bow-mounted weapon of an Immobile vehicle (D8.5). Yes.
[J1]