 In the United States and some military forces, "fuze" is used to denote a sophisticated ignition device incorporating mechanical and/or electronic components (for example a proximity fuze for an artillery shell, magnetic/acoustic fuze on a sea mine, spring-loaded grenade fuze, pencil detonator or anti-handling device) as opposed to a simple burning fuse.The situation of usage and the characteristics of the munition it is intended to activate affect the fuze design e.g.its safety and actuation mechanisms.