Galileo HAS allows precision down to 30cm with enough integration time. Without additional external data.

For free.

Receivers slowly hitting the market now - a year ago this was only receivable by SDR-driven devices.

"with enough integration time" — the article is about live navigation, which generally can't afford that.

	▲	NoiseBert69 2 hours ago \| parent [-]
		With SBAS 1-2m precision can be done easily in the US and EU. Most of the time enough for any navigational use. Pretty much all GPS/Galileo receivers are able to receive and decode these overlays.