🔍 Key Concepts

• Use the stability letter limits in items 3 and 4 (maximum deck cargo weight with rig water and maximum height of CG of deck cargo above deck). • Compute a weighted average vertical center of gravity (VCG) for all deck cargo using total weight and moments. • Relate the VCG of the 6 containers (at their own CG height) to the unknown VCG of the remaining deck cargo so that the combined VCG just meets the 2.0 ft limit.

💭 Think About

• From the stability letter, what is the maximum total deck cargo weight allowed when carrying rig water, and how much of that is already taken by the six containers? • What is the CG height of each container above the deck, based on its dimensions, and what total moment do those containers create? • How do you express the combined VCG of (containers + remaining cargo) as a single equation, then solve that equation for the unknown VCG of the remaining cargo when the combined VCG equals the allowed limit?

✅ Before You Answer

• Confirm the total allowed deck cargo (in long tons) under the specified condition (rig water and maximum capacity). • Convert the container weights to the same ton unit used in the letter, and be consistent in units for all weights and heights. • Before picking an answer, verify that your computed maximum VCG of remaining cargo, when combined with the containers, gives an overall deck cargo VCG of no more than 2.0 ft above the main deck.