What is the reference datum mean high water...

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Question 1 of 2066636ee928f7522a1c519bb2

What is the reference datum mean high water used to measure?

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66636ee928f7522a1c519bb2

What is the reference datum mean high water used to measure?

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🔍 Key Concepts

• Chart datums and why different datums are used for heights vs. depths • How mean high water (MHW) compares to mean lower low water (MLLW) • Which reference level is normally used for elevations of landmarks and structures on U.S. charts

💭 Think About

• Is mean high water a higher or lower level compared to most tidal datums, and would that be safer for showing water depths or for showing heights above the water? • When navigating visually, which features on land (like lights, cliffs, towers) need a vertical reference so mariners know how high they are above the sea? • Look at how U.S. charts typically label ‘elevations’ versus ‘soundings’—which tidal datums are associated with each?

✅ Before You Answer

• Confirm which datum (MHW or MLLW) is normally used for soundings (depths) on U.S. charts • Confirm which datum is standard for elevations/topographical heights on U.S. charts • Check that the chosen option matches the correct region (United States vs worldwide or Europe) and the correct type of measurement (heights vs soundings)

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Question 1 of 2066636ee928f7522a1c519bb2

What is the reference datum mean high water used to measure?

Back

Question 1 of 20

66636ee928f7522a1c519bb2

What is the reference datum mean high water used to measure?

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

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