The dividing meridian between zone descriptions +7 and +8 is __________.
Official USCG Answer & Rule Citation
Correct Answer: Option B — 112°30'W
Zone description +7 centers on 105 degrees West, while Zone +8 centers on 120 degrees West. The dividing meridian separating these two time zones is located precisely halfway between them at 112 degrees 30 minutes West, in accordance with standard maritime time zone conventions.
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