On 22/08/2020 14:58, NY wrote:
"Jim GM4DHJ ..." wrote in message
...
who has got caught out by the Zanzibar effect when calibrating
things..me for one

What is the Zanzibar effect? I can't find anything on Google so it's
evidently not a widely-known term.


Zanzibar effect

The famous story of the retired sea-captain on the island who takes his
time from the watchmaker in town only to find out that the watchmaker
uses the sea-captains cannon shots at 12 noon each day to set his own
clocks! [Attributed to Harrison (MIT) by Petley.]

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