An emissions management module for a mission management system of a moving platform, said emissions management module being configured to: —obtain attribute data representative of (i) prevailing emissions control parameters in the form of an emissions control region defined by the relative locations of said platform and another node; and (ii) a direction of said emissions control region with respect to said platform; —generate, using said attribute data, an emissions plan that complies with restrictions defined by said emissions control parameters, and includes at least an emissions limit defining: a) a maximum transmission power permitted to be utilised by an on-board antenna or portion of aperture antenna in a specified direction relative to said moving platform; and/or b) permissible antenna waveforms and/or a specified maximum emissions duration in said specified direction relative to said moving platform; and/or c) permitted or restricted usage of on-board sensors in a specified direction relative to said moving platform.