USCG USCG GENNAV
Set 4 • Question #104 of 246
Launch Interactive Practice Room The datum from which the predicted heights of tides are reckoned in the tide tables is __________.
A
mean low water
B
the same as that used for the charts of the locality
✓ Correct Answer
C
the highest possible level
D
given in table three of the tide tables
USCG NMC Regulatory Explanation
Mean Lower Low Water (MLLW) is the average of the lower low water height of each tidal day over a 19-year National Tidal Datum Epoch. It serves as the official chart sounding datum on NOAA nautical charts.
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