Electronic equipment for simulating and analyzing radar equipment; electronic devices for simulating single or multiple channel devices for amplifying and generating signals; electronic devices for simulating antenna radiation patterns for different types of antennas particularly electronic and mechanical tilted antennas, circular or rectangular aperture antennas and phase power and frequency power antennas; electronic equipment for simulating the environment and environmental influences on a radar system, particularly noise, the effects of moving from land to sea and the damping effects in the atmosphere; electronic devices for simulating the targets and sources of interference, particularly for defining interference zones and targets, for classifying and identifying interference sources and targets; electronic devices for simulating single and multiple channel signal receivers; electronic devices used for simulating signal processors for single or multiple channel devices; computer software and computer hardware for the aforesaid goods included in this class; parts for all the aforesaid goods included in this class; aeronautical apparatus and instruments, namely navigational instruments and apparatus