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