Sofia Werner onboard Annika Braren

Sea trials and performance monitoring

After installation of a wind propulsion technology, the performance should be assessed by an independent 3rd party. SSPA’s WASP Sea Trial is a time efficient and transparent way to evaluate the performance and fuel saving potential for wind assisted and wind powered ships.

SSPA leads the work within ITTC to define new officially recognized procedures for sea trials of Wind Assisted Ships. While waiting for these to be published (in 2024), using SSPA’s standard WASP Sea Trial Procedure is the most recognized procedures to follow. The methodology has been described in recent publications, see below.

The sea trial takes less than a day and can be conducted during service at any wind condition between Bf 5-7. The result is normalised to a given wind speed specified by the client. Additionally, the expected fuel saving can be derived for a given route, using in-house simulation software.

SSPA’s WASP Sea Trial has been used to several wind ships, including the vessels featured above, in the EU Interreg project WASP.


Further reading:

Werner, S.,, 2021, Speed Trial Verification For A Wind Assisted Ship, in the proceedings of RINA International Conference on Wind Propulsion, 15-16 September 2021, London, UK

Werner, S.,, 2022, Speed trial methodology for wind assisted ships, in the proceeding of HullPIC, May 2022, Ireland.