Star Trek - Lost Souls [Cortex +]
The Grand Trans-Mat or GTM, is the local name for the device that brought the expedition from P3-4797 to Mina. It’s a large, raised, circular platform about 100 feet across. Their are pillars around the platform, which hold up a domed ceiling. Stairs lead up the ‘front’ of the platform to the transport area. Two sets of stairs follow the curve of the platform at the back, rising to a rectangular platform roughly three meters from the transport area. There the controls for the GTM are located. The device appears to be made from stone with carved glyphs on the pillars.
The device is both transport and communications platform which uses the planetary magnetic field to enhance it’s range and form a tight beam point to point connection to a remote station. Using subspace and advanced power amplifying technology the GTM is able to send a signal, millions of light years. The system requires a station at the destination for both communications and transport.