A cross in a circle marking where a package balances.
A circle quartered by a cross marks the centre of gravity of a heavy or awkwardly loaded package, so it can be lifted without tipping. It is printed on the faces where a lifter can see it.
In the ISO 780 handling series, a quartered circle marks the position of the package's centre of gravity.
Contexts: Packaging
Printed on packages whose load is uneven enough that lifting at the geometric centre would tip them.
Contexts: Packaging
A circle divided into four quarters by one horizontal and one vertical line crossing at its centre, the lines extending slightly beyond the rim.
Both are used in packaging contexts.