Wärtsilä to Carry Out Propulsion Efficiency Retrofits on Ten Hafnia Tankers 23 November 2023 The retrofits are expected to cut fuel consumption and emissions in all operating conditions.Author: Capt. Johnhttps://shipandbunker.com/news/world/851227-wartsila-to-carry-out-propulsion-efficiency-retrofits-on-ten-hafnia-tankers