02:53 May 14, 2009 

If on board an aircraft it might prohibit the placement of cargo in a particular part of an aircraft because doing so would, for example, hinder access to emergency equipment, block access to a hatch/compartment/etc., or something else I can't think of this late at night :-)

01:22 May 14, 2009 

Then it could be: отсутствие багажных отсеков (в салоне самолета)

01:15 May 14, 2009 

Thanks! There is no context, this is just an Aircraft Hardware Standards Manual.

01:05 May 14, 2009 

Absent context, I assume this is a sign placed where a space is
to left left clear, such as in front of a door