GPS takes 30 seconds to know where it is
Two real NMEA 0183 logs decoded field by field (GGA, RMC, GSA, GSV, XOR checksum). The signal comes quickly, the orbit does not. The 50 bit/s navigation message, the 30 s frame, the ephemeris, the 12.5-minute almanac, and what cold, warm, hot starts and A-GPS change.