After building five diesel-electric platform supply vessels (PSVs) at Singaporeâs Yantai Raffles Shipyard, Tidewater is having additional vessels built in China. Currently the firm has 12 Cummins-powered diesel-electric vessels on order at the Fujian Mawei Shipbuilding yard. An additional four-boat order is being completed at the Shejiang Shipbuilding Company yard near Ningbo China. The first of the vessels, the Desoto Tide, was delivered in January â09 with the second, the Gubert Tide, receiving extra outfitting at Tidewaterâs Hong Kong facility in late April.