well reasoning for asking is that the bog tab broken from how i read it is hammada and hammada dont't bog on tracks so ...
I don't see any rule that says Broken Ground is hammada. Can you quote the rule? All I see is per F13.1 "each non-Depression Open Ground [EXC: not scrub, hammada or sand] hex Accessible to hammada (now crag) becomes a Broken Ground hex; i.e., it is treated as Concealment Terrain with a +1 TEM (but is neither an obstacle nor a Hindrance to LOS), uses
doubled Chapter B Open Ground MF/MP costs, and becomes a Bog hex for all vehicles." In that there is no mention of the Broken Ground hex being, becoming or being similar to a hammada hex, only that it is an Open Ground hex accessible to (a former) one.
It is not an unreasonable to suspect that there might be a missing erratum for this scenario, but I am not aware of one. I don't see any rule that removes the Bog DR when using a track through a Broken Ground hex.
So what is the bog DR mods for Broken then ??????
What are the bog DR mods for being adjacent to a marsh [B16.43]? They are the same as that.
JR