USCG Exam PracticeApplying tide corrections to charted depth
When applying NOAA Tide Table predictions to a subordinate station, which step is required before computing the corrected time of high or low water?
- A. Convert the reference station prediction to local apparent noon
- ✓ Apply the tabulated time and height differences from the subordinate station table to the reference station predictionCorrect
- C. Average the two nearest reference station predictions
- D. Subtract the tidal current slack water time from the reference station high water time
Why B is correct
Predictions for a subordinate station are obtained by applying the tabulated time and height differences to the reference station prediction. The mariner must also verify the correct time zone and whether daylight saving time applies before using the result. (Bowditch Ch. 9 §905)
Cited:Bowditch Ch. 9 §905