Secondarily there were (undocumented) features that allowed users to transmit, over a hidden IRC channel, telemetry of their position relative to planets or other ships and have other connected users automatically parse this information and render their ships locally.
Consequently this was the first recorded interactive multi-player add-on for Orbiter.
The method of operation was crude, requiring the user to manually activate a telemetry burst after each attitude or thrust. Time acceleration, ever a thorny problem with multi-player environments, needed to be used carefully. Docking was unmanaged. IRCMFD was therefore deemed the first-generation multi-player environment.
IRCMFD has fallen into abeyance since 2003. Future development is unlikely and a public download site is not known.