The article didn't say - are those aluminum hulls? Back at work, we went in partners with CA Fish&Game on a design and buy of a new class of enforcement vessels in the 65-90' range. Aluminum hull catamarans. All American Marine out of Bellingham, WA IIRC.
Every single one of them got hull cracks making the drive around Point Conception to Vandenberg AFB when the seas were 6'+. Just a terrible design flaw. IIRC, they were all rated for 10'+ seas. They weren't surviving short period uphills though.