The 27 migrants rescued by a Maersk Tankers crew nearly a month ago remain on board the ship.

The Danish tanker owner said on Tuesday that the 27 days the migrants have spent aboard the 36,900-dwt Maersk Etienne (built 2014) is a "new and unfortunate record" for a commercial ship.

"We are calling on responsible governments for urgent humanitarian assistance and a safe disembarkation of the 27 people we rescued four weeks ago," Maersk Tankers said in a statement.