The dividing meridian between zone descriptions +4 and +5 is __________.
Official USCG Answer & Rule Citation
Correct Answer: Option B — 67°30'W
Time zone descriptions +4 and +5 are centered on 60 degrees West and 75 degrees West meridians, respectively. The exact geographical dividing meridian separating these two westerly time zones lies precisely halfway between them at 67 degrees 30 minutes West, per Bowditch navigation standards.
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