At 0730, your position is LAT 41°10.5'N,...

Question 1 of 2707066636eea28f7522a1c51a8ce

At 0730, your position is LAT 41°10.5'N, LONG 72°32.2'W. From this position you steer course 286°psc with an engine speed of 9.0 knots. What is the approximate depth of water under your keel?

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Question 1 of 27070

At 0730, your position is LAT 41°10.5'N, LONG 72°32.2'W. From this position you steer course 286°psc with an engine speed of 9.0 knots. What is the approximate depth of water under your keel?

🔍 Key Concepts

• Dead reckoning (DR) position after running a course and speed for a given time • Using the chart to find charted depth (soundings and contours) at a specific position • Subtracting vessel draft from charted depth to get water under keel

💭 Think About

• How long are you actually running on course 286° psc before you need to know the depth, and what distance do you cover at 9.0 knots in that time? • Once you’ve found the DR position on the chart, what sounding or depth contour is closest to that point, and is it in feet or fathoms? • After you find the charted depth at the DR position, what information given elsewhere in the exam (or on the worksheet) do you need to subtract to get water under the keel?

✅ Before You Answer

• Be sure you’ve correctly converted psc (per steering compass) to true course using the proper variation and deviation given in the exam setup. • Confirm whether the charted depths are in feet, fathoms, or meters, and convert if needed so they match the answer choices. • Verify you are subtracting the vessel’s draft (from the exam’s vessel particulars) from the charted depth to get water under the keel, not the other way around.