🔍 Key Concepts

• Using a vessel’s tank capacity tables or trim and stability booklet to find moments from a given ullage or sounding • Relationship between ullage, liquid volume, and the corresponding transverse moment for that specific tank • Importance of matching the correct tank number and side (P/S) and the correct unit (foot-tons) when reading tables

💭 Think About

• What information would you normally look up in the vessel’s tank or stability tables when you know the ullage for a specific tank? • How does increasing or decreasing ullage in a tank affect the contained volume and therefore the transverse moment value you would find in the table? • If P‑Tank #6 has a known distance from the centerline, how does that distance combine with the tank’s loaded weight to form a transverse moment?

✅ Before You Answer

• Make sure you are using the table for P‑Tank #6 on the Deep Driller, not a different tank or vessel • Confirm you are reading the line for 5.7 feet ullage, not sounding or another similar value • Double‑check that the number you choose matches the transverse moment column in foot‑tons, not volume, weight, or longitudinal moment