USCG Exam PracticeApplying tide corrections to charted depth
US nautical charts reference charted soundings to which tidal datum?
- A. Mean High Water (MHW)
- ✓ Mean Lower Low Water (MLLW)Correct
- C. Mean Low Water (MLW)
- D. Mean Sea Level (MSL)
Why B is correct
Bowditch Ch. 4 §403 states that US charts show soundings referenced to Mean Lower Low Water (MLLW). This datum represents a conservative (shallow) reference, giving the mariner the least favorable depth.
Cited:Bowditch Ch. 4 §403