USCG Exam PracticeApplying tide corrections to charted depth
A chart shows a sounding of 10 feet at a particular location. The NOAA Tide Tables predict a height of tide of +3 feet at the time of your transit. What is the actual depth of water at that location?
- A. 7 feet
- B. 10 feet
- ✓ 13 feetCorrect
- D. 3 feet
Why C is correct
Actual depth equals the charted sounding plus the predicted height of tide. 10 feet + 3 feet = 13 feet. The charted sounding is the baseline at MLLW, and a positive tide height adds water above that datum.
Cited:Bowditch Ch. 9 §904