 In 2008 the vessel was acquired by Alcatraz Cruises, a subsidiary of Hornblower Cruises.The vessel, which was previously a commercial diving boat, underwent a retrofit, repower and refurbishment operation, at a cost of USD 4 million.In addition to its main power train, which consists of Tier 2 marine diesel engines, the "Hornblower Hybrid" uses power generated by two ten-foot-tall twisted Savonius wind turbines and a photovoltaic solar array covering the awning on the top deck.