You have 4 containers of rig supplies each...

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Question 1 of 2066636eec28f7522a1c51bef0

You have 4 containers of rig supplies each measuring 8'L by 8'B by 8'H and weighing 1.2 tons each. Each container is stowed on deck. What is the maximum VCG permitted of the remaining cargo if you are carrying rig water and load to maximum capacity? See illustration D037DG below.

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Question 1 of 20

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🔍 Key Concepts

• Read restriction 3 and 4 on illustration D037DG about the maximum height of the combined deck cargo VCG and the maximum deck cargo weight when carrying rig water. • Treat the deck cargo as two groups: the 4 containers (with a known weight and VCG) and the remaining cargo (with unknown VCG). Use a combined VCG (moment/weight) calculation. • Use the maximum allowed total deck cargo weight when rig water is carried, subtract the container weight to find the weight of the remaining cargo, then solve for the highest VCG that keeps the total deck‑cargo VCG within the 2.0‑ft limit.

💭 Think About

• From the letter, what is the maximum allowed total deck cargo weight when rig water is carried, and what is the maximum allowed deck cargo VCG above the main deck? • What is the VCG of each 8 ft high container sitting on deck, and what is the total weight and total moment of the four containers? • If the combined deck‑cargo VCG must not exceed the limit in the letter, how can you write a weighted‑average equation using (weight × VCG) for the containers plus the remaining cargo, then solve for the unknown VCG of the remaining cargo?

✅ Before You Answer

• Be sure you are using long tons consistently, as specified in the stability letter. • Confirm that you use the correct VCG for the containers (center of an 8 ft high box on deck) and that the combined VCG limit is measured above the main deck. • After solving for the unknown VCG, check that the total deck cargo weight (containers + remaining cargo) does not exceed the rig‑water maximum from the letter.

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