Though not directly related to the question(s) specifically, at least tangentially the following may provide some insight:
Given “Fortifications in Concealment Terrain may always set up hidden and remain hidden until…” (A12.33), what
concealed/HIP status may a unit within such a HIP foxhole claim at setup (i.e., may it also set up HIP by fact that it is in a HIP
foxhole)?
A. No “free” HIP due to setting up in a foxhole. But a hidden Pillbox allows the contents to set up using HIP as well; B30.7.
If the foxhole is later revealed by enemy LOS, in what way is the unit in the foxhole now revealed, if at all (i.e., still HIP or
concealed, was HIP but now placed on board and Concealed, or now on board and fully revealed)?
- A. Any hidden/concealed unit beneath a foxhole is not revealed just because the foxhole is.
As for Jeff's situation,
G.2 answers this question: "...
[EXC: an entrenchment whose occupant(s) are hidden is revealed when a non-Dummy enemy unit enters its Location only if ≥ one of its occupants is revealed too (see G.4); a pillbox is also revealed if any of its occupants fires]. ..."