Hi ya'll. We are fixing to go on our trip on the Liberty in September. My husband is signed up for the two tank dive of the wall in Grand Cayman. He has Open Water Certification, but has just now been told by a "friend" that he will absolutely need an "Advanced Open Water Certification." I went to Carnival's website and checked the information about the Excursion and it said C-Class certification, which is what my husband has.
Does anyone know for absolute sure about this?
Thanks in advance.