If a chart indicates the depth of water to...

Question 1 / 2066636ee928f7522a1c519316

Question 1 of 2066636ee928f7522a1c519316

If a chart indicates the depth of water to be 6 fathoms and your draft is 6.0 feet, what is the depth of the water under your keel? (Assume the actual depth and charted depth to be the same)

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Question 1 of 20

66636ee928f7522a1c519316

If a chart indicates the depth of water to be 6 fathoms and your draft is 6.0 feet, what is the depth of the water under your keel? (Assume the actual depth and charted depth to be the same)

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🔍 Key Concepts

• Relationship between fathoms and feet • How to compute under keel clearance (UKC): total depth minus vessel draft • Careful unit conversion before doing any subtraction

💭 Think About

• First, convert the charted depth from fathoms into feet. How many feet are in one fathom? • Once both depth and draft are in the same units, what simple subtraction do you perform to get under keel clearance? • After you subtract, which answer choice is closest to your calculated value?

✅ Before You Answer

• Make sure you use 1 fathom = 6 feet when converting • Confirm that both depth and draft are in feet before subtracting • Re-check your subtraction: Depth in feet − Draft in feet = Under keel clearance in feet

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Question 1 of 20

If a chart indicates the depth of water to be 6 fathoms and your draft is 6.0 feet, what is the depth of the water under your keel? (Assume the actual depth and charted depth to be the same)

6.0 feet

26.5 feet

30.0 feet

56.5 feet

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