On a flight from Manchester to Frankfurt we discussed the possibility of using modern tools to improve classroom teaching in ATC. Covering the knowledge of a Tower / Approach and an Area Controller we identified the need for a radar-simulator that could be used for classroom teaching. Since this kind of simulator did not exist , we decided to create it - and the idea for ROSE was born. Having access to the experience of eighteen years of programming in assembler and C++ we were basically fit for this task. Our main aim was to keep ROSE very flexible and easy to use while focusing on the realistic behaviour of aircraft and all functions of ATC-Radar-Systems. Once the first steps were made we realized, that our success had caused other teachers to voice their needs for simulators. Step by step ROSE developed from a classroom teaching tool into a fully useable simulator - still running on any normal personal computer. Special requirements concerning the creation of exercises and the generation of airspaces were defined. Covering almost every aspect of these time-consuming tasks we created a new standard of datapreparation for simulators in ATC. ROSE will be delivered with 300 different types of aircraft - capable of offering new types, whenever you need them. Besides other outstanding features, ROSE offers you: - a userfriendly graphical surface to create airspaces and exercises - positioning of any airspaceelement or aircraft with a mouseclick - an outstanding analysis of functions for coaching - stripprinting - multinet simulation This is possible during the preparationphase as well as during a running simulation. Since you are probably beginning to doubt what you have read, we suggest you try it yourself and be surprised by ROSE. Klaus Fischer & Wolfgang Bretl