Zhoushan Changhong International Shipbuilding Co., Ltd. (Changhong International Shipbuilding) has commenced construction on two further 3,100-teu feeder container ships ordered by Greek shipowner Costamare Shipping Company S.A., bringing the total number of vessels in this series under construction at the Chinese yard to seven.

Steel cutting on hull numbers CHB2083 and CHB2084 took place simultaneously at 08:58 on 7 August in the yard's machining workshop. The commencement ceremony was attended by the shipowner's on-site supervision team, Watermark Consultants, DNV project manager Wang Jiangpeng, and representatives from the yard's relevant departments.

The vessels were designed by Neptun Design and are classed by DNV. Each ship has an overall length of approximately 199.98 metres, a beam of 35.2 metres and a depth of 17.9 metres.

From a fuel and emissions standpoint, the design incorporates a desulphurisation system — or scrubber — enabling the vessels to burn high-sulphur fuel oil (HSFO) while remaining compliant with sulphur emissions regulations. Both the main engine and main generators are fitted with selective catalytic reduction (SCR) systems, meeting International Maritime Organization Tier III nitrogen oxide emissions requirements.

The vessels are also equipped with a medium-voltage shore power connection system, designed to allow onboard generators to be shut down during port calls, reducing carbon, sulphur and other air pollutant emissions while at berth.

According to Changhong International Shipbuilding, hull lines have been optimised for varying draught and trim conditions, with the vessels said to be capable of exceeding 18.6 knots at 90% of specified maximum continuous rating (SMCR), while offering reduced fuel consumption in economic speed mode. The shipbuilder also states that the full hull structure has undergone strength verification through finite element analysis, covering various load conditions including potential jump loads.