The distance between the surface of the water and the tidal datum is the __________.
Official USCG Answer & Rule Citation
Correct Answer: Option D — height of tide
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.
100% Free & Open Access — No daily limits, paywalls, or gated answers on BrightMariner.