[LEAPSECS] Dava Sobel article about Charlottesville meeting

[Harlan Stenn]

"Gerard Ashton" writes:

> Dava Sobel mention that time displayed on cell phones is consistent.


That hasn't been my experience.


> But I just took a course on evaluating emergency exercises where the

> instructor emphasized the importance of synchronizing watches with the

> exercise leader, so that records of events by evaluators in different

> locations can be correlated. The instructor claimed that the times

> displayed by different cell phones can vary by several minutes.


That has been my experience.

I have an NTP app for my iPhone, and so far the most "off" that I've
seen is 1 minute.  But the clock that controls the displayed time is not
disciplined well at all.

H