Comment 10 for bug 1308338

For flightgear, the problematic package is libnetcdf6, which was replaced by libnetcdfc7.

Broken libnetcdfc7:amd64 Breaks on libnetcdf6 [ amd64 ] < 1:4.1.1-6 > ( libs ) (< 1:4.1.1-7~)
  Considering libnetcdf6:amd64 1 as a solution to libnetcdfc7:amd64 0
  MarkKeep libnetcdfc7 [ amd64 ] < none -> 1:4.1.3-7ubuntu2 > ( universe/libs ) FU=0
  Holding Back libnetcdfc7:amd64 rather than change libnetcdf6:amd64

Because of this, there is a domino effect that causes libgdal1h to not be installed, which then causes libopenscenegraph99 to not be installed, which then causes flightgear and simgear to not be installed.