It took a thousand or so miles of sailing with the long, powerful waves of the Pacific Ocean for Hannah Jenner, a rising star in ocean racing, to get comfortable in this year’s Transpacific Yacht Race. Jenner, a 31-year-old from Britain, is used to racing ultralight 40-footers across oceans. But in the Transpac this month, Jenner was sailing Dorade, a 52-foot wooden sailboat from 1930 that is trimmed in varnished mahogany and adorned with polished bronze hardware.