Navigation General · USCG Exam Prep
chart symbols and abbreviations Practice Questions
chart symbols and abbreviations is one of the Navigation Generaltopics tested on the USCG captain's license exam. Binnacle School has 8 questions on it — here are 5 to try right now, each with the correct answer and a written explanation of why.
1. On a nautical chart, the symbol for a wreck shown as a submerged danger to navigation (least depth unknown but considered less than 11 fathoms) is:
- A.A sunken wreck symbol with surrounding dotted lines✓
- B.A solid hull silhouette on the surface
- C.A cross (+) symbol
- D.An anchor symbol with a circle
Why: Per Chart No. 1, a submerged wreck considered dangerous to surface navigation is depicted with a wreck symbol surrounded by a dotted danger line, indicating the hazard area around it.
2. The abbreviation 'PA' appearing next to a charted feature on a nautical chart means:
- A.Position approximate✓
- B.Prohibited anchorage
- C.Partial above-water
- D.Private aid
Why: Per Chart No. 1, 'PA' stands for 'Position Approximate,' indicating the charted position of the feature is not precisely known and mariners should exercise caution.
3. On a NOAA nautical chart, what does an anchor symbol enclosed within a circle indicate?
- A.A designated anchorage area✓
- B.A prohibited anchorage zone
- C.An emergency anchorage only
- D.A commercial anchorage requiring a permit
Why: Per Chart No. 1, an anchor symbol within a circle marks a designated anchorage area where vessels may anchor; prohibited anchorages are shown with an anchor and an X or specific notation.
4. On a nautical chart, the symbol for a rock that is awash at the level of chart datum is:
- A.An asterisk or star (*) symbol✓
- B.A plus (+) sign
- C.A filled circle (•)
- D.A diamond (◇) shape
Why: Per Chart No. 1, a rock awash at chart datum level is shown with an asterisk (*) symbol, distinguishing it from submerged rocks (shown with a +) and rocks always above water (shown as land).
5. The reference publication used to identify all symbols, abbreviations, and terms used on NOAA nautical charts is:
- A.Chart No. 1✓
- B.The Coast Pilot
- C.Light List
- D.Notice to Mariners
Why: Chart No. 1 (officially 'Nautical Chart Symbols, Abbreviations and Terms') is the official NOAA/NGA reference that explains every symbol and abbreviation used on U.S. and international nautical charts.
Drill all 8 chart symbols and abbreviations questions
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