Disclosed is a vertical nitride semiconductor device including a conductive substrate; a semiconductor layer bonded to the conductive substrate via a second electrode; a metal layer formed on the conductive substrate; a first electrode formed on the semiconductor layer; and a bonding layer formed between the conductive substrate and the second electrode. One or more routing instructions may be determined to route one or more individuals away from a location corresponding to the emergency event based at least in part on at least one category associated with the emergency event, a type of the emergency event, and one or more estimated locations of one or more mobile devices associated with the one or more individuals. The frame further comprises a lower rope guide flange that forms a lower rope guide groove, the lower rope guide flange and lower rope guide groove being situated rearward of the upper rope guide flange and upper rope guide groove on a bottom part of the frame. Improved performance, reduced costs, and improved security can thereby be attained.