WIP.
- https://gpsd.gitlab.io/gpsd/NMEA.html
- https://tronico.fi/OH6NT/docs/NMEA0183.pdf
- https://cdn-shop.adafruit.com/datasheets/PMTK_A11.pdf
- https://receiverhelp.trimble.com/alloy-gnss/en-us/NMEA-0183messages_MessageOverview.html
- https://web.archive.org/web/20221024051512/https://www.nmea.org/Assets/20160520%20txt%20amendment.pdf