The handymax-size tanker Pacific Sunstone, under construction at New Times Shipbuilding in Jiangsu Province, China, has been equipped with four of bound4blue's so-called "eSAILs," known more commonly as suction sails. Bound4blue and Eastern Pacific Shipping (EPS) said this is the second installation of eSAILs in EPS’ fleet, and the first on a newbuild for EPS.  

The suction-sail technology works by dragging air across each sail's surface, and then through small perforations to generate lift and propulsion. Bound4blue's eSAILs also automatically adjust to wind conditions. 

Bound4Blue says the sails have surged in popularity within the tanker segment, because they have smaller footprints than other solutions — eSAILs generate lift up to seven times greater than conventional rigid sails of the same size — there’s no need for tilting systems, and no impact on a vessel’s operational airdraft.

José Miguel Bermúdez, CEO and Co-founder of bound4blue, described it as “a winning combination” for a crucial segment. “Tankers are integral to world trade, but, due to their complexity, can pose headaches in terms of decarbonization,” he said in a March 19 press release. “At bound4blue we’re committed to helping owners voyage towards sustainability, with mechanically simple, easy to install solutions that deliver both double digit fuel, and emissions, savings and easier regulatory compliance.”

Bound4blue says its DNV type approved technology is now the preferred choice of a range of leading global shipowners, including Odfjell, Maersk Tankers, Klaveness Combination Carriers and BW Epic Kosan, amongst others.