This is known as a "DangerClose" strike and requires extra coordination and finesse to ensure that friendlies are not struck.
这称为“危险距离”打击,要求高度协同和精密计算来确保友军不被误击。
2
But where the boundaries between danger, potential damage and safety lie, and how they vary with the type and number of ash particles, was not taken into account in the decisions to close airspace.