otnmbrd wrote:
Gary wrote in
news:uuQOf.109032$B94.27750@pd7tw3no:


And how did you check the error on that deck watch? Radio? What was
the error and how much does it change daily? Can't just do the time
check anymore. Damn lightening.




Most watches/clocks are fairly consistent in their rate of error.
Prior to your loss of electronics you would have/should have been
maintaining a log of the watch/clock you would use for this type emergency
so that you would know not only it's error but daily rate.
You apply this error and daily rate to your calculations.

otn
Just my point, but who actually is doing this? Thank goodness for the GPS.