🔍 Key Concepts

• Sounding and capacity tables for DEEP DRILLER tanks (locating tank C3P and the correct column for longitudinal moment) • How longitudinal moments are tabulated (about which reference point and with what sign convention) • Using interpolation between tabulated soundings if 15 feet is not listed exactly

💭 Think About

• First, find tank C3P in the stability booklet: what columns are given for each sounding (volume, LCG, and/or longitudinal moment)? • Is there a value listed directly for 15 feet, or do you need to interpolate between two nearby soundings to get the volume or moment? • Once you have the appropriate value(s) at 15 feet, how do you determine both the magnitude and the sign of the longitudinal moment for that tank?

✅ Before You Answer

• Confirm you are using C3P (port side) and not the corresponding starboard tank or a center tank line. • Verify the units in the table match the answer choices (foot-tons) and that you are not looking at a transverse or vertical moment column by mistake. • Double‑check the sign convention in the booklet (forward vs aft of the reference point) so the positive/negative sign of the moment matches the table’s convention.