1 definition by CaptainIncredible

In close air support, artillery, mortar, and naval gunfire support fires, it is the term included in the method of engagement segment of a call for fire which indicates that friendly forces are within close proximity of the target, usually 600 metres however The close proximity distance can be determined by the weapon and munition fired.
"steelrain, steelrain, this is Hitman calling in fire mission, popeye uniform 059 098 038 degrees 200 metres, danger close"

"roger that hitman, splash in 5 seconds"
by CaptainIncredible June 15, 2009
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