The Logiplus GPS synchronized clock permits to unify the display of time on board of all engines on the network. An internal real-time backup clock guarantees the availability of time information in all circumstances. A NFF-69010 serial link is available to update the ATESS recorder on the SNCF network. The GPS data frame is also available in rough format on a RS485 line for use by other equipment’s such as passenger information systems. Custom-made LCD display, indication of summer or winter time, automatic illumination control. Logiplus also provides a GPS antenna which is designed for internal mounting under a polyester roof and avoids drilling the roof. The antenna is designed with Compact dimensions (130 x 50 x 30 mm).