Two weeks from now I hope to take my brother on a short cruise on the 56-foot yawl Mariner before his wedding. The boat was a labor of love for Robert and Elizabeth Teidemann, who parlayed their love of boats into a boat restoration and executive training business. Apparently, they spawned a mini industry in Narraganset Bay taking people on charter cruises of boats in the 12 meter racing sloops formerly used in the America's Cup.