USCG USCG GENNAV
Set 2 • Question #58 of 246
Launch Interactive Practice Room The datum used for soundings on charts of the Atlantic Coast of the United States is mean __________
A
low water
B
lower low water
✓ Correct Answer
C
higher high water
D
high water
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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