USCG Exam PracticeApplying tide corrections to charted depth
Predictions for a subordinate tidal station are obtained by which method?
- A. Reading the subordinate station directly from the main tide tables without adjustment.
- ✓ Applying tabulated time and height differences to the predictions of the reference station.Correct
- C. Using the tidal current tables in place of the tide tables for that station.
- D. Interpolating between the two nearest reference stations by geographic distance.
Why B is correct
NOAA Tide Tables provide time and height differences for subordinate stations that are applied to the reference station's predictions. The analyst must also verify the correct time zone and daylight saving time adjustment before applying the correction.
Cited:Bowditch Ch. 9 §905