Your vessel's drafts are: FWD 22'-04", AFT...

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Question 1 of 2066636eec28f7522a1c51d13e

Your vessel's drafts are: FWD 22'-04", AFT 22'-10"; and the KG is 22.6 feet. Use the selected stability curves in the blue pages of the Stability Data Reference Book to determine the righting arm at 45° inclination.

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Question 1 of 20

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🔍 Key Concepts

• Mean draft from forward and aft drafts and how it’s used to enter the blue-page curves • How KG (height of center of gravity) affects the righting arm taken from the Stability Data Reference Book • Reading the GZ (righting arm) value at a specific angle from a family of stability curves

💭 Think About

• First, how do you combine the forward and aft drafts given to get the draft that is actually used to select the proper stability curve? • Once you’ve picked the correct curve (or curves) based on draft/displacement, what role does the given KG play—do you pick a curve, apply a correction, or interpolate? • After you locate the 45° point on the chosen curve, what are you actually reading off the vertical scale, and in what units?

✅ Before You Answer

• Be sure you are using the mean draft (in feet and decimal of a foot, not feet and inches) to enter the blue-page data, not just the forward or aft draft alone. • Verify you are on the correct KG/GM line or applying the proper correction for KG = 22.6 ft rather than using an uncorrected cross curve. • Double‑check the scale units for GZ on the chosen curve and that you read the value exactly at 45°, not at a nearby angle.

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