USCG Exam PracticeTides and currents — predictions and corrections
On a US chart, charted soundings are referenced to which datum?
- A. Mean High Water (MHW)
- ✓ Mean Lower Low Water (MLLW)Correct
- C. Mean Sea Level (MSL)
- D. Mean Low Water (MLW)
Why B is correct
Bowditch Ch. 9 §904 states that charted soundings on US charts are referenced to Mean Lower Low Water (MLLW), the datum from which tide tables predict the height of tide.
Cited:Bowditch Ch. 9 §904