Definition(s)
Sudden Cyclone
Sudden tropical revolving storm that forms near the site and that can affect the jack-up before demanning can be completed within the time required by the emergency evacuation plan. NOTE The intent is that the jack-up be assessed to L1 for the specified sudden tropical revolving storm.
Source: ISO 19905-1:202, Petroleum and natural gas industries – Site-specific assessment of mobile offshore units – Part 1: Jack-ups. Global Standards