The US government wants to block whistleblower awards for the three seafarers who exposed illegal oil discharge from an MST Mineralien Schiffahrt Spedition und Transport ship, leading to a $3.2m fine.

In court papers, the government argued that Jaroslav Hornof, the third engineer aboard the 27,700-dwt Marguerita (built 2016) who documented the discharge, should have reported the crimes directly to the US Coast Guard, not to MST, and harmed his case by refusing to commit to serving as a witness at trial.