Complex sentence: The TI Class of ships are the four largest double-hulled supertankers in the world and are,, the largest ocean going ships, since the previous largest one, the single hulled supertanker "Seawise Giant", was scrapped in 2010.
Split into simpler sentences: The TI Class of ships are the four largest double-hulled supertankers in the world and are, as of 2010, the largest ocean going ships currently in service. The previous largest ship, the single hulled supertanker "Seawise Giant", was scrapped in 2010.