🔍 Key Concepts

• U.S. Chart No. 1 chart symbols section for area boundaries and limits • Differences between symbols for military operation areas vs fishing/trap areas vs dredged material disposal • How line style and color (magenta vs black) are used on NOAA charts to show special use areas

💭 Think About

• Look up how NOAA charts symbolically distinguish between fish trap areas, gunnery exercise areas, amphibious training areas, and dredge spoil grounds—do they all use the same line style? • Ask yourself what color and line style are typically used for danger or restricted areas used by the military, compared with fishing or dredging activities. • Consider why a feature would be drawn in magenta instead of black—what does magenta usually represent on U.S. nautical charts?

✅ Before You Answer

• Verify in U.S. Chart No. 1 the exact meaning of a broken magenta line with alternating long and short dashes drawn as an area boundary. • Confirm which of the answer choices is specifically associated with a magenta, not black, broken boundary line on NOAA charts. • Double-check that you are looking at the correct symbol for an area around Mobjack Bay, not a point feature or isolated obstruction.