Denmark’s Uni-Tankers has claimed energy savings of between 15% and 17% on two small chemical tankers following retrofit projects.

The gains come following the installation of a new control and monitoring system from Sweden’s Berg Propulsion aboard the 6,000-dwt Anhout Swan and Lessow Swan (both built 2008) as well as an upgrade to each vessel’s main engines to run in variable revolutions per minute (rpm) mode.