The vital bits of the new 46 are nearly identical to the old 45. The hull and underwater appendages are the same, but the deck and interior have been modified. Structurally, the 46 also follows the 45. The hull laminate, a combination stitched-biaxial and chopped-strand mat, is laid up by hand in isophthalic polyester resin. Below the waterline, it’s bulked up with two additional layers of 2mm Coremat. Above the waterline it is cored with closed-cell Airex foam.