While the DEEP DRILLER is loaded as shown in...

Question 1 / 2066636ee728f7522a1c5178ab

Question 1 of 2066636ee728f7522a1c5178ab

While the DEEP DRILLER is loaded as shown in Sample Form #4 (Drilling), casing is accidentally dropped over the starboard side. Because the sounding level and starboard inclination are rapidly increasing, you decide that tank 1S is damaged. Your best countermeasure is to __________.

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🔍 Key Concepts

• Transverse stability and list correction when a single starboard tank is flooding • Effects of counterflooding vs. deballasting on an already heeling vessel • How vertical center of gravity (KG) and free surface effect change when you dump mud or alter ballast tanks

💭 Think About

• First, picture where tank 1S is located on the DEEP DRILLER and which way the vessel is already inclining. Which actions would add weight to the starboard side, which to port, and which would remove weight altogether? • Ask yourself how each option changes both heel and stability margin: does it reduce the starboard list and improve GM, or make one or both worse? • Consider what happens if a tank is flooding freely: will plugging a vent stop or increase unintended flooding, and what risks that creates for internal pressures or progressive flooding?

✅ Before You Answer

• Identify which choice would move weight to the high (port) side or remove weight from the low (starboard) side, helping to correct the list. • Check which actions would increase free surface or raise KG, and avoid those that would further reduce stability. • Verify whether counterflooding into a port tank in this particular loading condition keeps the vessel within allowable heel and draft limits on Sample Form #4 rather than just ‘making her feel more upright’.

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Question 1 of 20

counterflood into 9P

place a wooden plug into the vent of tank 2S

dump the mud

deballast from tank 2S

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Question 1 / 2066636ee728f7522a1c5178ab

Question 1 of 2066636ee728f7522a1c5178ab

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Question 1 of 20

66636ee728f7522a1c5178ab

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🔍 Key Concepts

💭 Think About

✅ Before You Answer

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