There are a several hundred dry-docks spread around the world, most of them situated in Asia. It means you have a wide range of options docking your ships for intermediate and main classing. Also knowing there are just about 1.8 million oil tankers, bulk carriers, general cargo ships, gas carriers, chemical tankers, ferries and other passenger ships with an average age of 20.6 years, there will be a queue at the shipyards.