USCG Exam PracticeLatitude, longitude, and geographic coordinates
Geographic coordinates published in 33 CFR Part 100 without a stated horizontal datum reference may be plotted on a NAD 83 chart only after which action is taken?
- A. Converting the coordinates from degrees-minutes-seconds to decimal degrees
- ✓ Applying the appropriate datum corrections published on the chart being usedCorrect
- C. No correction is necessary because NAD 83 and unlabeled coordinates are interchangeable
- D. Confirming the coordinates with a GPS receiver referenced to WGS 84
Why B is correct
33 CFR §100.01(b) states that geographic coordinates without the NAD 83 reference may be plotted on NAD 83 charts only after application of the appropriate corrections published on that particular chart. Plotting without correction can introduce a positional error.
Cited:33 CFR §100.01