During the afternoon she was towed under the shears at the Navy Yard to receive her masts, yards, and rigging, and the work of fitting them was done under the supervision of Lauchlan McKay, her captain. As no vessel before or since ever had such enormous spars, their dimensions are interesting enough to be given in full: Masts Diameters Lengths Mastheads Inches Feet Feet Fore 44 130 36 Top 24 76 12 Topgallant 18 28 0 Royal 15 22 0 Skysail 11 19 Pole 12 Main 44 131 36 Top 24 76 12 Topgallant 18 28 0 Royal 15 22 0 Skysail 11 19 Pole 12 Mizen 40 122 33 Top 22 69 10 Topgallant 16 22 0 Royal 10 19 0 Skysail 8 15 Pole 8 Yards Yardarms Fore 26 110 6 Lower topsail 24 90 5 Upper topsail 19 76 4½ Topgallant 15 62 4 Royal 12 51 3½ Skysail 9 40 3 Main 28 120 6 Lower topsail 24 92 5 Upper topsail 19 76 4 Topgallant 15 62 4 Royal 12 51 3½ Skysail 9 40 3 Crossjack 24 90 5 Lower mizentopsail 19 76 4½ Upper mizentopsail 15 62 4 Topgallant 12 51 3½ Royal 9 40 3 Skysail 6 29 2 The spankermast, nowadays called the jigger, was 26 inches in diameter, 110 feet long, including 14 feet head, and the topmast was 40 feet long divided at 15 and 10 feet above the cap, for the gaff-topsail and gaff-topgallantsail. The spanker boom was 40 feet long, including 2 feet end, and the gaff 34 feet, including 8 feet end. The bowsprit was 44 inches in diameter and 30 feet out-board; the jibboom 23 inches in diameter, and 18 feet outside of the cap, and the flying jibboom was 14 feet long including 6 feet end. Her fore and main rigging and fore-and maintopmast backstays were 12½ inch, four-stranded Russian hemp rope, wormed, and served over the eye and over the ends to the leading trucks. The mizen rigging and mizentopmast rigging were of eight-inch rope.