The COASTAL DRILLER is loaded as shown in...

Question 1 of 2921866636ee728f7522a1c517738

The COASTAL DRILLER is loaded as shown in the Sample Load Form Number 1 (Rig Move). If the contents of the No.1 drill water tank are discharged, what would be the new LCG?

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Question 1 of 29218

The COASTAL DRILLER is loaded as shown in the Sample Load Form Number 1 (Rig Move). If the contents of the No.1 drill water tank are discharged, what would be the new LCG?

🔍 Key Concepts

• How discharging weight from a tank affects the vessel’s longitudinal center of gravity (LCG) • Using the weight–moment–LCG relationship: Total Moment = Total Weight × LCG • How to correctly remove a single tank’s weight and moment from a loaded condition

💭 Think About

• From the original loaded condition, what is the total weight and the total longitudinal moment of the vessel? • What are the weight and longitudinal moment of the No.1 drill water tank, and how do you subtract them from the totals? • After you find the new total weight and new total moment, what is the correct formula to compute the new LCG, and does the result fall between reasonable values compared to the original LCG?

✅ Before You Answer

• Be sure you are using the correct LCG reference (AF0) and the correct sign convention from the load form. • Confirm the weight and LCG of No.1 drill water tank exactly as listed on Sample Load Form Number 1 — don’t estimate. • After calculating the new LCG, double‑check that it moves in the expected direction when you remove that particular tank’s weight (i.e., does the center of gravity shift toward or away from that tank’s location?).