Скачать или смотреть Accuracy of the Casio F-91W Watch

One of the world’s most famous watches is also one of the most accurate, as we show here with actual measurement data on 6 samples. Links below show ways to get accurate time various ways. We also describe a way to use 10 cellphone pictures of the test watch and reference watch to obtain the watch error to the nearest tenth of a second.

Here is the summary of the rates: first batch +1.22, +1.50, -1.61 seconds per 10 days; second batch +0.22, +0.87, -0.83 seconds per 10 days

Finding watch rate: http://davidburchnavigation.blogspot....

Ways to get accurate UTC (GMT): http://davidburchnavigation.blogspot....

(We include a rated F-91W in our GPS Backup Kit: https://www.starpath.com/catalog/acce... )