The principal lunar tidal period is approximately:

✓ 12 hours 25 minutesCorrect
B. 24 hours 00 minutes
C. 12 hours 00 minutes
D. 24 hours 50 minutes

Why A is correct

The principal lunar tide has a period of approximately 12 hours 25 minutes. This is why in semidiurnal tidal regimes, successive high waters are separated by slightly more than 12 hours.

Cited:Bowditch Ch. 9 §901

More Tides and currents — predictions and corrections questions

Tides are caused primarily by which of the following?
The term 'flood current' refers to which condition?
Spring tides, which have the greatest tidal range, occur when the moon is in which phase(s)?
On a U.S. nautical chart, the datum to which charted soundings are referenced is:
A vessel has a draft of 9 feet. The chart shows a sounding of 7 feet at a shoal. The predicted height of ti…
The vertical clearance under a fixed bridge will be LEAST when:

Start drilling in 30 seconds. Free.

No signup, no credit card — answer 5 real, cited exam questions right now.

Try 5 free questions See how it works

The principal lunar tidal period is approximately: — USCG Exam Practice · CaptainsGround