What information must be available to use...

🔍 Key Concepts

• Allowable Wind and Wave Charts are used to decide if a unit can safely operate in certain environmental conditions • Think about what basic environmental parameter those charts are usually plotted against for offshore units like jack‑ups and drillers • Consider what physical factor limits how waves can grow at a given location

💭 Think About

• Ask yourself: what variable do you normally see along the axes of wind and wave limitation charts for an offshore unit? • Which option directly affects the development of waves in a given area, rather than the unit’s internal properties? • Which choice would a marine operator most likely check on a chart or notice to decide if they can safely stay on location?

✅ Before You Answer

• Verify which option is a site condition that can change from location to location • Check which factor would be needed to determine how large waves can become at a given site • Rule out any options that relate more to subsurface geotechnical design or vessel characteristics rather than reading an environmental limitation chart

What information must be available to use the Allowable Wind and Wave Charts for the COASTAL DRILLER?

Soil conditions

Water depth

Specific gravity of the sea water

Overturning moment