Sirena Marine just keeps growing. Last year the high-class Turkish builder started its new powerboat line (officially called Sirena Yachts) with a 64-foot long-range cruiser, first shown at the Dusseldorf show, followed by a 56-foot version introduced at the Miami show. Now it will have both of those models in the water at the Cannes show in September, where Ipek Kirac, the company’s CEO, will announce plans for an even larger yacht. Both the 56 and 64 are impressive cruising boats with clean, contemporary European lines and curved wraparound pilothouse windows. They come with an impeccable pedigree. German Frers, one…

Sirena Yachts, the powerful Turkish builder, is on a roll. They launched their new 64 in Dusseldorf in January and had sold four by the time they had a second 64 and a brand-new 56 at the Yachts Miami Beach show last week. And they gathered all their heavy guns there for the world-wide debut of the 56: Ipek Kirac, the company’s CEO; German Frers, one of the foremost designers in the world, who drew the hull and exterior; and Tommaso Spadolini, of Design Studio Spadolini in Florence, who did the interior. “The U.S. market is very important to us,”…