About Boating Safely: 8:30 a.m. to 5 p.m. the U.S. Coast Guard Auxiliary at Imperial Point Medical Center, 6401 N. Federal Highway, Fort Lauderdale. Cost: $50. 954-941-5781; 561-350-3395; http://wow.uscgaux.info/pe_class_flyer.php?unit=NAT&course=16341.

Navegando América: 8 a.m. to 4 p.m. course in Spanish, with the U.S. Coast Guard Auxiliary at Dixon Ahl Recreation Center, 2200 NE 38th St., Pompano Beach. Cost: $50, includes materials and lunch. 731-907-0307.

GPS for Mariners: 9:30 a.m. to 12:30 p.m. sponsored by the U.S. Coast Guard Auxiliary at Monica Burguera Foundation, 3750 W. Flagler St., Miami. No cost. 305-428-2453; http://wow.uscgaux.info/pe_class_flyer.php?unit=NAT&course=19630.

Fort Lauderdale Beach sweep: 7-11 a.m. cleanup at Fort Lauderdale Beach Park, 1100 Seabreeze Blvd., Fort Lauderdale. 954-593-8501.

Mad Hatter’s Tea Party: 11:15 a.m. to 12:45 p.m. finger foods, music and tea at Stranahan House Museum, 335 SE Sixth Ave., Fort Lauderdale. Cost: $25 adults, $15 kids 12 and under. Advanced registration required. www.goriverwalk.com/locations/historic-stranahan-house-museum.