Which data is NOT used in the Allowable Wind...

🔍 Key Concepts

• Allowable Wind and Wave Charts purpose and what they are designed to limit on a jack-up like COASTAL DRILLER • Typical environmental factors considered for safe operations: wind, waves, and sometimes currents • Typical structural/operational inputs for a jack-up rig: displacement/total weight, leg penetration, air gap, etc.

💭 Think About

• Ask yourself: which of these choices is more of an environmental condition and which are more rig/soil parameters used to establish the chart limits? • Think about how the chart is built: does it start from the rig’s weight and leg/soil conditions, or from the sea state and current? Which of these is more likely to be a result rather than an input? • On a jack-up, what must you know about the legs and bottom conditions before you can safely apply any wind and wave limits?

✅ Before You Answer

• Identify which options relate to the rig and seabed characteristics versus metocean (environmental) conditions • Consider whether leg penetration is something that must be known before using or after using the chart • Check if current is normally plotted or limited on a chart specifically labeled as an Allowable Wind and Wave chart

Which data is NOT used in the Allowable Wind and Wave Charts for the COASTAL DRILLER?

Total weight

Leg penetration

Wave height

Current

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