FS2002/FS2004 Virtual Aircraft Check Client. This utility can be used to test the skills of a pilot or to control the pilot during a competition of simulated flight with an Internet connection. The VAC Project is divided into three programs, server, client, VAC3D (to built 3D dimensional gate). VAC Client downloaded before 31-03-2004 does not work so please redownload it. Help in Italian language only. By Pietro Incardona.