Simrad's GS25 GPS/GLONASS antenna, with integrated e-compass/gyro, is a precision position-and-heading sensor. When used with a compatible Simrad NSE, NSO or NSS display, the antenna provides course-over-ground information at any speed, and enables radar overlay on charts. Users configure the update rate at 1, 5 or 10 Hz. The advanced chipset offers enhanced time-to-first-fix and supports multiple Global Navigation Satellite Systems. The antenna also communicates with GPS, GLONASS and WAAS/EGNOS/MSAS. Its compact size and NMEA 2000 antenna compatibility enable easy installation and optimal positioning. The antenna costs $199. Visit simrad-yachting.com.