As clocks are concerned, I note an incresing shift between standard and radio guided [atomic, changed automatically by the Navy] clocks. My method is simple. I set 3 normal digital clocks equal to a radio guided [atomic, changed automatically by the Navy] clock. Few days later, the 3 standard clocks stay at the same hour/min/sec time but are not in synch with the radio guided one. For now, we loose almost 1 second per day, which is relatively important, I think.
Offered by H.