An expert has torpedoed the US Department of Justice's (DOJ) knowledge on the yacht market and its plans to sell the 1MDB-linked vessel Equanimity in the US.

Allan Wilson, owner of the Wilson Yacht Management Group - the company that operates the Equanimity - said the DOJ and its expert Alan Swimmer did not appreciate the value and scale of the vessel.

"With regard to issues of marketability and sale, the government and Mr Swimmer do not seem to understand or appreciate the difference between a 100-meter yacht - such as the Equanimity - and a 100-foot yacht," Wilson said..