The tugs “RT Darwin” and “RT Tasman” built in Singapore, have a power of 6,500 HP and 84 tons Bollard Pull. Each tug is equipped with three Schottel propulsion units providing them with unique maneuverability. Due to the rate of increase in the size of container vessels and the demand of ship owners to attend these vessels with the same limited number of tugs, Kotug has replaced two older tugs by these new strong Rotor Tugs. On their way from Singapore to Europe, Kotug Offshore B.V. contracted the towage of the flat top barge “UR 171” ( 100 x 33 m) to Stavanger, Norway.