Offshore platforms
What it is
Structures at sea that support drilling, production or wind turbines.
How it works
Fixed jackets or gravity bases carry deck loads and resist waves; some float and are moored.
Diagram: Indiacon original, not to scale.
Main components
Foundation, jacket or gravity base, deck, risers.
Key codes
ISO 19900 series. Cited by number only; get the text from BIS or the issuing body.
Notable projects
Troll A (Norway).