The full period of motion of the DEEP...

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Question 1 of 2066636ee728f7522a1c517c62

The full period of motion of the DEEP DRILLER while in transit is 7 seconds and the maximum pitch angle as seen on the inclinometers is 4 degrees. From the standpoint of critical motion, the motion is __________.

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Question 1 of 20

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🔍 Key Concepts

• Critical motion limits for self-elevating units / MODUs (mobile offshore drilling units) in transit • Relationship between roll/pitch period and angle of inclination when assessing motion severity • What actions are normally required when motion approaches or exceeds operating limits

💭 Think About

• Compare the given period (7 seconds) and maximum pitch angle (4°) to typical limiting values used to judge whether motion is acceptable for continued transit or requires corrective action. • Think about whether a 4° pitch at a 7‑second period would likely cause heavy, moderate, or relatively gentle motions for personnel and equipment. • Ask yourself: if motion is judged unsatisfactory, which corrective option (ballast, change course/speed, or standby) is usually considered the first and most practical response while still underway?

✅ Before You Answer

• Verify in your stability/motion criteria tables what maximum pitch angle and period are considered acceptable for transit conditions. • Check which response options are operational adjustments while underway versus actions that imply stopping operations or going to a different draft condition. • Confirm which choice best matches the standard procedure when motion is near or beyond acceptable limits but you still have room to alter handling (course/speed) before taking more drastic steps.

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