Abstract: A glow-in-the-dark marking pen that is intended for use for marking structures during search and rescue operations, particularly during a fire, is herein disclosed. The glow-in-the-dark properties of the ink are activated by breaking an inner glass tube contained within the plastic marker body and shaking it. The cap is removed and the pen can be used upon various surfaces as needed. The glow-in-the-dark ability of the ink allows others to see writing in diminished lighting environments, such as emergency personnel who wish to alert other personnel that a room of a structure is being checked or has been checked.