UTC Time Check

Normal Procedures

Eddie sez:

I will admit to being a little lackadaisical about time, I don't even wear a watch when I'm not flying. But when you are flying, it pays to be accurate. Time is, after all, the foundation of navigation. More about that: Latitude & Longitude.

Everything here is from the references shown below, with a few comments in an alternate color.

Last revision:


UTC Time Check

Through HF

Before the days of GPS the frequencies were crawling with time hack stations. Most of those, alas, are gone. The frequencies 5000, 10000, 150000, and 25000 got you something almost everywhere in the world. These days those frequencies are pretty much just in the United States, but you might get lucky.

The National Institute of Standards and Technology (NIST) broadcasts on the following frequencies from the locations noted:

Frequency (MHz) Latitude Longitude
2.5 40°40'52.2" N 105°02'31.3" W
5 40°40'42.1" N 105°02'24.9" W
10 40°40'47.8" N 105°02'25.1" W
15 40°40'45.0" N 105°02'24.5" W
20 40°40'53.1" N 105°02'28.5" W

Through the Internet

Most of the dedicated sites for UTC have gone away because you can simply type "UTC Time Check" into your favorite search engine.

Through the GPS


Photo: G450 MCDU Nav Ident page, from Eddie's aircraft.