Departing from shore between the Halekulani and Sheraton Waikiki hotels, this white catamaran with green sails offers a big variety of boat trips. Reserve ahead for a 90-minute daytime or sunset booze cruise (children allowed; yes, they serve soft drinks as well as mai tais) or a moonlight sail to take in the Hilton Hawaiian Village’s Friday fireworks show. Family-friendly reef-snorkeling tours include an onboard picnic lunch.