The standard atmospheric pressure measured in inches of mercury is __________.
Official USCG Answer & Rule Citation
Correct Answer: Option A — 29.92
Standard atmospheric pressure is defined at sea level as 29.92 inches of mercury, equivalent to 1013.2 millibars or hectopascals. Bowditch and standard meteorological references utilize this benchmark value for calculating barometric corrections and evaluating weather systems during passage planning.
100% Free & Open Access — No daily limits, paywalls, or gated answers on BrightMariner.