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USCG Exam Practice · Latitude, longitude, and geographic coordinates

Geographic coordinates published in 33 CFR Part 100 that are NOT labeled NAD 83 may be plotted on a NAD 83 chart only after what action is taken?

  1. AConverting the coordinates from degrees-minutes-seconds to decimal degrees
  2. BApplying the appropriate datum corrections published on the particular chart being used✓ correct
  3. CObtaining a corrected position from the nearest Coast Guard Sector office
  4. DConfirming the coordinates with an electronic position fixing device before plotting

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 the particular map or chart being used.

Cited:33 CFR §100.01

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