Built in secret, the Project Omar superyacht will be the second for Russia's richest man.

The Lürssen shipyard in Bremen, Germany, has launched a new, 156m superyacht.

Called Project Omar, very little is known about the year’s largest superyacht, which is listed only as “custom” in Lürssen shipyard’s build list for 2015.

The steel-hulled, aluminium yacht will become the fourth largest yacht in the world when she is delivered in 2016.

Project Omar, largest superyacht 2015

Project Omar is reportedly being built for billionaire Alisher Usmanov, whose estimated $14.7 billion fortune is thought to be the largest in Russia. Usmanov also owns a 110m superyacht built by Lürssen, named Dilbar.

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