The ANSI 'safety alert symbol' used to indicate physical injury of some kind may result. The color is usually changed to match the safety sign it's associated with, however this black and white one is found in equipment manuals for drawing attention to critical instructions that could result in injury if ignored.It is sometimes replaced on signs with ISO W001 General Warning on signs and labels used outside of the United States.
Drawn from descriptions found in ANSI Z353 standards.
The Navigators