Nmea 4.11 Exclusive -

The checksum hex values, converted to ASCII, spelled:

$POVRID,1,GYRO_RESET,FORCE_CALIBRATE,00*3A nmea 4.11

The phrase typically refers to a specific sentence type within the NMEA 0183 standard (the common protocol for talking to GPS receivers and other marine electronics). The checksum hex values, converted to ASCII, spelled:

“Someone injected a false horizon,” Kaelen said, voice low. “They’re using NMEA 4.11’s biggest flaw: no authentication. Any device that speaks the sentence structure gets heard.” Any device that speaks the sentence structure gets heard

“It’s a ghost in the machine,” Lin whispered. “Old code from before the Burn. Someone set a logic bomb years ago, set to trigger when the city’s listed data matched a fake scenario.”

He sent it once. Twice. The rogue module stuttered. Its fake stream glitched. For a single second, the real gyro data broke through: $PROMT,1,ROLL,0.0,N,OK*1F

NMEA 0183 is a combined electrical and data specification for communication between marine electronics. Version 4.11 is a significant revision that maintains the protocol's legacy of simplicity while expanding its capacity to handle data from modern Global Navigation Satellite Systems (GNSS).