The UK is not pressing ahead with court action arising from the suspected hijacking of a Navios product tanker off the Isle of Wight off southern England.
Special forces stormed the 75,000-dwt Nave Andromeda (built 2011) on 25 October after the crew raised concerns about stowaways.
Matthew Okorie, 25, and Sunday Sylvester, 22, were charged with conduct endangering ships in December.