🔍 Key Concepts

• Using a tank capacity/sounding table specific to the vessel (DEEP DRILLER) to convert feet of sounding into long tons and transverse moment • Understanding that transverse moment for liquids in tanks is usually taken about the vessel’s centerline, with a sign convention (e.g., port negative, starboard positive) • Carefully matching the exact sounding value (8.75 ft) to the correct line or interpolation in the tank table

💭 Think About

• Which table in the stability booklet would you use to find the weight and transverse moment for a given sounding in fuel oil tank 4P? • For a port-side tank, how is the sign of the transverse moment typically assigned, and which answer choices reflect that sign? • Does the magnitude of the transverse moment you select make sense compared to the capacity of a typical fuel oil tank on a vessel like DEEP DRILLER (think: is it too small, too large, or reasonable)?

✅ Before You Answer

• Confirm you are using the correct tank table for "fuel oil tank 4P" and not a different tank or unit system • Verify the soundings and units: the table should match 8.75 ft and give moments in ft-long tons • Check the sign convention: port vs starboard; make sure the sign (positive/negative) of your chosen answer is consistent with a port-side tank moment