- This project is a collaborative research effort of the Israeli Air Force (IAF), Synergy Integration LtD. and Ben-Gurion University. It is directed to design and develop tools and display layouts to facilitate task switching and coordination among operators in Multi-Operator Multi-UAV (Unmanned Aerial Vehicle) environments. All for the benefit of improving overall mission performance. In this paper we focus on one of the main tools that were developed - 'Castling Rays'. The 'Castling Rays' tool is a UAV-switching decision aid, enabling operators to visually view which UAV has the best view of 'their' target at any given moment. Structured interviews with experienced operators strengthened the necessity and importance of this tool in reducing operators' workload and improving their situation awareness.