package, with strong support for multiple screens. Voice communication (VoIP) software is commonly integrated into a simpit, as this allows real-time communication with other virtual pilots. Other software may be custom written to control hardware aspects of the pit; e.g. an interpreter for an MFD or a custom listener to implement an AoA Indexer. In many cases the need for custom software can be removed by using control hardware with a comprehensive SDK or API, but frequently an off-the-shelf solution is not available for unique instruments and so citation software is needed. See also Gaming chair References Flight training