"Long Range Navigation version C receivers"@en . . "POS05" . "70-130kHzhyperbolic950kmto 1700km (day): 650km to 1250km (day)1947 to 2010. Maintained as GPS backup in the EU.Global navigation based on transmitters in several European countries, Japan, Canada (until 2002-10) and USA (until 2010-02-08)." . .