OTAM just launched its new 70HT fast luxury cruiser, powered by twin 2,000-hp MTU diesels. The sleek, low-profile, three-stateroom yacht will make its official debut at the Cannes Yachting Festival starting on Sept. 7. For the past 65 years, OTAM  has been making custom cruising yachts, ranging from 45 to 130 feet, in its yard in Liguria, Italy. The new 70HT was built with the same customization, craftsmanship and luxury that have defined the brand. The hull comes from Umberto Tagliavini Marine Design; the rest of the boat from the BG Design Firm, which said that “the design is strongly…