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cvalue13
·It’s fairly simple to “imagine” where the GMT hand is pointing.
True for you perhaps, but not for most.
That 6 is 3 and 7 is 3.5, etc., is not very natural to most.
Which surely is why the instruction booklets of, e.g., the GMT Master II, describe telling a third time zone in terms not of imagining what’s on the dial, but instead necessitating rotating the bezel the necessary +\- zones to display the third time before then returning the bezel back to the reference time.
Even the Apollo astronauts, with military/pilot’s backgrounds (eg operating professionally on military/UTC time) still found it difficult to read a 24hr watch that did have numerical indices on the dial!
Interview of Wally Schirra (by Chuck Maddox):
