USCG USCG GENNAV
Set 5 • Question #144 of 246
Launch Interactive Practice Room The distance between the surface of the water and the tidal datum is the __________.
A
range of tide
B
height of tide
✓ Correct Answer
C
charted depth
D
actual water depth
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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