Tower C has another frequency 163.530 on a different licence might show up as another frequency with 164.460. 452.450 used to be LTR with Minto Security, doubt if it's still active but heard blips on it not too long ago.So now that this particular site has now been found perhaps that would be needed for this particular user to still be able to use the system effectively for them. Renfrew site would be too far for them to communicate back to there base from Ottawa. So an Ottawa affiliate site would be needed.
Would the Bronson site still not be still too far though to communicate with the renfrew site though and the rest of the system? Or is there still yet another site in between to make that link? Site 7 perhaps? With Bronson being Site 8.
Any possibilities from the Place De Ville or Moodie Dr sites listed here that could also be part of this system as well?
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As for Site 7, if/when it appears, logically would be between Renfrew and downtown Ottawa as that is a bit of a stretch even on VHF.