USCG USCG GENNAV
Set 4 • Question #97 of 246
Launch Interactive Practice Room A tide is called diurnal when __________.
A
only one high and one low water occur during a lunar day
✓ Correct Answer
B
the high tide is higher and the low tide is lower than usual
C
the high tide and low tide are exactly six hours apart
D
two high tides occur during a lunar day
USCG NMC Regulatory Explanation
In USCG General Navigation principles (Bowditch, Light Lists, and Coast Pilots), regarding 'A tide is called diurnal when', the verified fact is: 'only one high and one low water occur during a lunar day'.
Question Discussion & Notes
0Have a doubt, memory trick, or exam update? Share your insights with fellow mariners.
Loading mariner discussions...