/usr/include/Inventor/navigation/ is in libcoin80-dev 3.1.4~abc9f50+dfsg3-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/Inventor/navigation/SoScXMLDollyTarget.h
/usr/include/Inventor/navigation/SoScXMLFlightControlTarget.h
/usr/include/Inventor/navigation/SoScXMLMiscTarget.h
/usr/include/Inventor/navigation/SoScXMLMotionTarget.h
/usr/include/Inventor/navigation/SoScXMLNavigation.h
/usr/include/Inventor/navigation/SoScXMLNavigationTarget.h
/usr/include/Inventor/navigation/SoScXMLPanTarget.h
/usr/include/Inventor/navigation/SoScXMLRotateTarget.h
/usr/include/Inventor/navigation/SoScXMLSeekTarget.h
/usr/include/Inventor/navigation/SoScXMLSpinTarget.h
/usr/include/Inventor/navigation/SoScXMLZoomTarget.h