Training in this topic provides knowledge of function and diagnostics of various bridge navigation equipment useful during its maintenance and repairs: Radars, Automatic Radar Plotting Aids (ARPA), Navigation Satellite Systems, Gyrocompasses, Speed Logs, Autopilots, Echosounders, ECDIS, Voyage Data Recorders, Wind Trackers, Navigation Lights, Horns, Searchlights, GMDSS Equipment (lnmarsat Sat C, NBDB terminal with MF/HF transceiver, DSC, NAVTEX, EPIRB, SART), Satellite Communication Equipment (lnmarsat, Iridium), Automatic Identification Systems (AIS, LRIT), and Ship Security Alert System (SSAS).