Retrofit completed at Tsuneishi Shipbuilding
The Japanese yard Tsuneishi Shipbuilding finished the installation of OceanWings’ rigid wingsail on the Ultramax bulk carrier Maria Topic in late August 2026. According to a press release cited by Ship & Bunker, the retrofit was carried out under the joint supervision of Tsuneishi and OceanWings, allowing the vessel to return to commercial service immediately.
Technology and project backing
OceanWings announced on 25 August that the addition of its Wind‑Assisted Propulsion System (WAPS) demonstrates “that rigid wingsail technology can be successfully integrated into an operating merchant vessel.” The firm highlighted the retrofit as a practical step toward reducing fuel consumption, a claim echoed by MarineLink, which described the project as a milestone for commercial wind‑assisted propulsion.
The installation was supported by the European WHISPER (Wind Energy Harvesting for Ship Propulsion Assistance and Power) initiative, funded through the EU’s Horizon Europe programme. Both OceanWings and Maritime Logistics Professional note that WHISPER brings together 13 partners from six European countries to develop modular retrofit solutions that combine wind‑assistance with renewable onboard energy systems.
Operational data to be disclosed
Both Ship & Bunker and MarineLink report that the owners plan to present initial performance figures at the SMM Hamburg exhibition in September 2026. The data are expected to show the wingsail’s impact on fuel burn and greenhouse‑gas emissions, providing a benchmark for future retrofits.
Implications for the bulk carrier fleet
The successful integration on an existing Ultramax vessel illustrates that wind‑assisted technologies need not be limited to newbuilds. Tsuneishi Shipbuilding emphasised its experience in ship repair and retrofit as a key enabler, while OceanWings stressed its manufacturing capability for commercial ships.
What this means for operators
For ship owners and charterers, the Maria Topic case offers a concrete example of how a mid‑life retrofit can be achieved without taking the vessel out of service for an extended period. The backing of the WHISPER project suggests that further EU funding may be available for similar upgrades, potentially offsetting capital costs. Operators should monitor the forthcoming SMM Hamburg data to assess fuel savings and emission reductions, which could inform decisions on fleet‑wide adoption of rigid wingsails as part of a broader decarbonisation strategy.