[time-nuts] Loran-C & French Clocks
brooke at pacific.net
Tue Mar 17 12:36:42 EDT 2009
I've more than once misread a clock display of the type 12:34:05.
I've noticed that military clocks show 1234:05 and there's no mistaking the
time. Seems like a more foolproof display format.
Poul-Henning Kamp wrote:
> In message <C5E4EE4D.6481%James.P.Lux at jpl.nasa.gov>, "Lux, James P" writes:
>> On 3/17/09 5:58 AM, "Arnold Tibus" <Arnold.Tibus at gmx.de> wrote:
>>> Interesting facts:
>>> The GPS navigation system has GPS Time as its basis. Galileo
>>> will have TAI as its basis. GLONASS has UTC as its basis,
>>> Air traffic controllers are using UTC.
>> The latter is probably because air traffic control is basically done at a
>> resolution of 1 minute [...]
> The underlying requirements is 10 seconds, and many ATC installations have
> special UTC clocks with five digits because that makes it pretty hard to get
> it wrong.
> One does pause on seeing a clock with 12:34:5 where the last digit clearly
> isn't dead, because there is no space for it :-)
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