oh Luthier, about topography

[Flyby]

I just read a passage from Alexander McKee's "Strike from the Sky" in which a bomber pilot is flying at 0.ft into an inlet where the white cliffs are above him on both sides, and he pulls up, then dives down again over the terrain on a low level strike. My question is about the accuracy of the topography modeled in SoW_BoB. No one expects it to spot on, but what can we expect?
thanks!
Flyby way out