On 08/11/2011 05:40 AM, RHF wrote:

- BTW, what type of clocks are good enough
- for space travel ?

For the USA it used to be Bulova Accutrons
in the Spacecraft; and Omega Speedmasters
on the Wrists of the Astronauts.

you can get a nice cesium clock that'll fit in a couple rack spaces
these days. I have a wild quartz clock that has kept perfect time for 23
years. It has a Westminster chime that synchronizes perfectly with the
Beeb's Five Pips. My Casio goes beepbeep right in the middle.