🔍 Key Concepts

• Vertical moments in stability calculations are found by multiplying the vertical distance (above or below a reference point) by the weight added or removed. • When a tank is filled, you must get the weight of the contents from the load form and its vertical center of gravity (VCG) relative to the chosen datum. • Transit condition in a sample load form means you use the specific data for that condition (not departure or arrival conditions).

💭 Think About

• From the DEEP DRILLER sample load form #1 (Transit), identify the total weight of P-tank #4 when completely full. What units is this weight given in, and do you need to convert? • Locate the vertical center of gravity (VCG) or vertical distance of P-tank #4 from the reference datum. How is that distance measured (above/below baseline or keel)? • Once you have weight and vertical distance, how do you combine them to get a vertical moment, and what must you watch for with signs (positive/negative) and units to match the answer choices?

✅ Before You Answer

• Confirm you are using P-tank #4 data from the correct sample load form and condition (Transit), not another tank or condition. • Verify the weight units (tons vs long tons vs metric tons) and the distance units (feet) so your product is in foot-tons. • Double-check whether the question wants the additional vertical moment (i.e., only from filling this tank) rather than a total moment including other items.