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

Question 1 of 2707066636ee928f7522a1c519316

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 27070

Q

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)

🔍 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