🔍 Key Concepts

• Use the ullage (empty space above the liquid) to find the volume or weight of liquid in P-Tank #5 from the tank calibration table for the Deep Driller • From the same tank table, find the corresponding longitudinal moment for that ullage (or for the volume/weight at that ullage) • Pay attention to the sign convention (positive/negative) used for longitudinal moments in the Deep Driller’s stability data

💭 Think About

• What is the relationship between ullage and the amount of cargo in the tank, and how do the tank tables help you convert one to the other? • Once you locate 6.4 feet ullage in the tank table, what column(s) on that line give you the information you need to identify the longitudinal moment? • If 6.4 feet ullage is not listed exactly, how should you handle values that fall between two listed ullages in the table?

✅ Before You Answer

• Confirm you are using the correct tank table for P-Tank #5 on the Deep Driller (not a different tank) • Verify the ullage entry of 6.4 feet is read correctly (no confusion with sounding or another unit) • Double-check the sign (− or +) of the moment and match the exact numerical value from the table or proper interpolation to one of the choices