Question 479Navigation General

The correct answer is B) green. On a chart reproduced by the National Geospatial-Intelligence Agency (NGA) from a foreign source, a wire-dragged (swept) area is typically shown in green. This is in accordance with the International Hydrographic Organization (IHO) standards for nautical chart symbols and abbreviations, which specify that swept areas should be depicted in green. The other options are incorrect because yellow, magenta, and red are not the standard colors used to represent swept areas on NGA-reproduced foreign charts. Yellow is typically used for caution areas, magenta for man-made features, and red for dangerous or prohibited areas.