FSX – Features For Alphasim Flying Boat Kawanishi Mavis. WWII flying boat Kawanishi Mavis from Alphasim with special features. The panel is now FSX compatible. Five cameras shows interesting views of the gunner positions and four external cameras show the best sides of the airplane. Six of eight AA guns are configured with weapon effects. Panel reconfiguration by Michael Pook, camera and weapon configuration by Erwin Welker.