🔍 Key Concepts

• Stability and wind overturning moment on a self-elevating (jack‑up) unit in transit • Required minimum leg penetration / immersion of can tips for severe weather while underway • How wind speed (e.g., over 70 knots) affects required safety margins for leg depth

💭 Think About

• Think about which leg depth would best resist strong sideways wind forces on the hull and legs without letting the unit "trip" or capsize. • Compare the shallowest and deepest options: which depths would offer very little resistance to sliding or overturning, and which would give a strong "anchor‑like" effect? • Ask yourself: for winds over 70 knots, would the regulations or operating manual be more likely to require only a token immersion, or a substantial margin below the hull?

✅ Before You Answer

• Verify what the operations manual or stability booklet specifies for leg position in transit with severe wind (over 70 knots). • Check that the chosen depth gives a realistic safety margin for a large jack‑up rig, not just a small clearance below the hull. • Eliminate options that would leave the can tips barely below the hull, providing almost no stabilizing effect in heavy weather.