The Serco-Denholm managed naval tug fleet at Portsmouth has been enhanced by the addition of a powerful new tug Atlas following the retirement of Setter at the end of May. She is on trial until October 2005, when Serco-Denholm's contract is up for renewal. Originally completed as Yenikale at Istanbul in 1999, she as been acquired on a bareboat charter from Turkish builders Uzmar. With a bollard pull of 33 tonnes she is more powerful than Tugs Bustler and powerful. She as two Caterpillar 3508B main diesel engines giving a speed of 12.5 knots.