Sometimes foreign charts are reproduced by...

Question 1 / 2066636ee928f7522a1c51a0f7

Question 1 of 2066636ee928f7522a1c51a0f7

Sometimes foreign charts are reproduced by NGA. On such a chart a wire dragged (swept) area may be shown in purple or which other color?

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Question 1 of 20

66636ee928f7522a1c51a0f7

Sometimes foreign charts are reproduced by NGA. On such a chart a wire dragged (swept) area may be shown in purple or which other color?

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🔍 Key Concepts

• NGA charts vs. original foreign charts and how colors may differ from standard U.S. chart symbology • The meaning of a wire-dragged (swept) area on charts and where it is usually explained • Color conventions used for special information or cautionary areas on many chart systems

💭 Think About

• Check Chart No. 1 (or its foreign equivalent) and look at the section dealing with swept areas and wire-drag surveys—what colors are shown there? • Think about which chart colors are typically reserved for highlighting cautionary or supplemental information rather than basic features like buoys or land areas. • Ask yourself: if purple is already being used, which of the remaining colors is most commonly paired with it for similar ‘special-purpose’ or overprinted information on charts?

✅ Before You Answer

• Verify in Chart No. 1 (NGA or Admiralty) how wire-dragged/swept areas are symbolized, including colors. • Confirm which colors on charts are mainly used for overprints and special warnings rather than for normal navigation marks like lateral buoys or land tint. • Eliminate any colors that you know are strongly associated with other fixed meanings (such as land, buoy systems, or traffic separation schemes) on standard charts.

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Question 1 of 20

Sometimes foreign charts are reproduced by NGA. On such a chart a wire dragged (swept) area may be shown in purple or which other color?

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Question 1 / 2066636ee928f7522a1c51a0f7

Question 1 of 2066636ee928f7522a1c51a0f7

Sometimes foreign charts are reproduced by NGA. On such a chart a wire dragged (swept) area may be shown in purple or which other color?

Back

Question 1 of 20

66636ee928f7522a1c51a0f7

Sometimes foreign charts are reproduced by NGA. On such a chart a wire dragged (swept) area may be shown in purple or which other color?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed