M. Warner Losh wrote:
In message: <[EMAIL PROTECTED]> James Maynard <[EMAIL PROTECTED]> writes: : M. Warner Losh wrote: : > In message: <[EMAIL PROTECTED]> : > James Maynard <[EMAIL PROTECTED]> writes: : > : ones position using sight reduction tables. Today a mechanical watch or : > : chronometer, or a battery-powered wristwatch, can be set to UTC using : > : radio time signals. Then when power fails, the sailor still has a : > : reasonably accurate spprodximation to UT1 available. : > : > If DUT1 is broadcast, then one can set the time keeping device to UT1 : > by a means similar to setting it to UTC, even if DUT1 exceeds 0.9s : > with a similar accuacy (or better). There's nothing that says a watch : > has to display UTC to be set correctly. : > : > Warner : > : > . : > : And how is DUT1 to be broadcast in a language-independent manner? That : protocol needs to be established well in advance.It already is being broadcast in, eg, WWV. Warner
But the protocol for broadcasting DUT1 in, e.g., WWV, does not provide for DUT1 values of more than plus or minus 0.9 s. The value of DUT1 could be announced by voice message -- but that would not be language-independent. If I travel to asia in my boat, I will not be able to benefit from DUT1 announcemnts in Japanese from JJY or in Chinese from BPM (or whatever their standard time and frequency station is). An longwave broadcasts such as those from WWVB do not have voice modulation at all! -- James Maynard Salem, Oregon, USA
