The 318,000-dwt Maersk Ingrid looms large in Keppel Shipyard’s Tuas Dock. The vessel, barely a year out of the building yard, is not in for any regular maintenance work. When viewed from aft the reason for the ship’s third visit into drydock in less than two weeks becomes clear — workers are busy installing a Becker Mewis Duct in front of the ship’s propeller.

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