USCG Exam PracticeApplying tide corrections to charted depth
Where on a US nautical chart would you find the unit of measurement used for soundings?
- A. In the chart legend box near the compass rose
- ✓ In the chart titleCorrect
- C. In the notes section on the chart border
- D. In the applicable Coast Pilot volume
Why B is correct
Both Bowditch Ch. 4 §403 and the Light List Depth Unit Notation source confirm that the sounding unit (feet, fathoms, or metres) is stated in the chart title. A mariner must verify this before plotting or applying any depth corrections.