Hi readnwrite53 and welcome to cruise-chat.com!
According to the shore excursion description on the NCL Web site (click HERE
), the Catamaran Cruise does include time for snorkeling.
Given the description for the Virgin Gorda Baths & Snorkel excursion (click HERE
), particularly the part about swimming 50 to 100 yards, I'd say your husband made a wise decision to forgo that option.