Can you bareboat charter a catamaran with an ASA 104 certification?

Yes, you can bareboat charter a catamaran with an ASA 104 certification: most Caribbean fleets accept it as the baseline credential. The certificate is not the whole picture, though. Charter companies approve bookings from a sailing resume: boat sizes handled, days on the water, anchoring and docking experience, and who else aboard can sail. Catamaran time matters. A sailor stepping up from a 35-foot monohull should expect questions about twin-engine docking, and some fleets want ASA 114 or logged cat hours before releasing a 40-footer. Thin resume? Companies commonly assign a skipper for the first day, a paid check-out sail, rather than refuse the booking outright. A fully crewed charter skips the vetting entirely.