In addition to the sails used on sailboats in older times, the industry has also developed systems in which boats are dragged along by a large kite and the wind it receives, and systems which take advantage of the Magnus effect to generate lift force by rotating a cylindrical piece of equipment on the deck.

Some of these are already being practically implemented, and wind-assisted propulsion systems for ships are developing further every day.

In light of the situation, ClassNK has developed its Guidelines for Wind-Assisted Propulsion Systems for Ships, in order to contribute to the safe integrity and design of this technology and the ships that are installed with it.

In addition to verifying structural strength, outlining methods for proving structural integrity of strength members, and utilizing calculation methods for load amounts, the guidelines provide class notations for ships whose equipment is designed and installed in line with the guidelines.

The contents of the guidelines will be consistently revised in following the developmental progress of the related technology.

Once wind was main source to propel ships and the technology utilizing wind is emerging again to energize ships’ environmental performance...To promote the safety and soundness of designs applying wind-assisted propulsion system, we will keep on updating our guidelines in line with further technology progress as well as providing the certification on individual systems or concepts,

...said Mr. Hayato Suga, Corporate Officer and Director of Plan Approval and Technical Solution Division.