April 7 

Practical Marine Radar

This one day course presented by the Chesapeake Area Professional Captains Association is designed to show practical use of marine radar for piloting, chart navigation and collision avoidance. Annapolis Elks Lodge #622, Edgewater, Md. 9 a.m.-4 p.m. 410-573-0201; www.capca.net.

14 

Project Clean Stream

Volunteer at one of over 150 sites throughout Maryland and help the Alliance for the Chesapeake Bay clean up the Bay's streams and tributaries. Call for details and specific locations. 9 a.m.-noon. 410-377-6270; www.alliancechesbay.org.

14 

Potomac River Cleanup

Join one of the largest annual Bay cleanup projects, which will take place at over 300 sites in the Potomac River watershed. Call for site information. Potomac River, 9 a.m.-noon. 301-292-5665; www.potomaccleanup.org.

14 

Blackwater Cleanup Day

In honor of Earth Day, Blackwater National Wildlife Refuge volunteers will help pick up litter and debris in preparation for the summer. Blackwater National Wildlife Refuge, Cambridge, Md. 9 a.m.-3 p.m. 410-228-2677; www.fws.gov/blackwater.

14 

Second Saturday

Cambridge, Md., will be hopping with fun evening events, gallery receptions, special dinners and sales. Downtown Cambridge, Md. 5-9 p.m. 443-477-0843; www.cambridgemainstreet.com.

17-18 

Safe Boating Course    


The Chesapeake Bay Maritime Museum will host this two-day boating safety course to help new boaters obtain their Maryland certificate of boating safety. Preregistration required. Chesapeake Bay Maritime Museum, St. Michaels, Md. 410-745-2916; www.cbmm.org.

20

Tiki Bar Opening Day

This huge party marks the beginning of the wild and crazy season at the Tiki Bar in Solomons, Md. Noon. www.tikibarsolomons.com.

21 

Privateer Day

Bring the whole family to Fells Point for a day of swashbuckling fun, with pirate re-enactors, dockside ship tours and pirate ship cruises and a live "sea battle" between the Pride of Baltimore II and the schooner Farewell. Fells Point, Baltimore. Noon-6 p.m. 410-675-8900; www.fellspointmainstreet.org.

21 

Boatyard Bar & Grill Spring Fishing Tournament

This catch-and-release tournament to benefit local Bay charities boasts a day of fishing, a fun after-tournament party with great prizes and the winning fish's outline painted on the rafters at the Boatyard. Boatyard Bar & Grill, Annapolis. Fish weigh-in by 4:30 p.m., party 4-8 p.m., awards ceremony 5:30 p.m. 410-216-6206; www.boatyardbarandgrill.com.

21 

Betterton Beach Cleanup

Help prepare Betterton Beach for the upcoming season by cleaning up the beach. Preregistration required. Betterton Beach, Md.9 a.m.-noon. 410-810-5948; www.kentparksandrec.org.

21 

Chesapeake Tugboat Exhibit Opens    


The Chesapeake Bay Maritime Museum will open its newest exhibit, "Push and Pull: Life on Chesapeake Tugboats." The exhibit depicts life aboard tugs and their invaluable relationship to the Bay. Chesapeake Bay Maritime Museum, St. Michaels, Md. 10 a.m.- 5 p.m. 410-745-2916; www.cbmm.org.

21-22 

Portsmouth Power in the Park

Watch hydroplanes skim the water at blazing speeds, from your boat or Portsmouth City Park during the Virginia Boat Racing Association's State Championships. Portsmouth City Park, Portsmouth, Va. Noon-5 p.m. 757-439-0803.

21-28 

Virginia's Historic Garden Week

Discover some of Virginia's most beautiful homes, gardens and historic landmarks along the James, Rappahannock and Potomac rivers and on the Eastern Shore. Call for times and locations. 804-644-7776; www.vagardenweek.org.

22

Earth Day On the Square 

Head to Leonardtown, Md., for an earth-friendly celebration, with live music, kids' nature crafts and free kayak and canoe rides. Leonardtown Square, Leonardtown, Md. 12:30-4:30 p.m. 301-475-9791.    

26-29 

Cruisers University

In conjunction with the new spring sailboat show in Annapolis, this cruising-preparation series features up to four days of boating education geared to cruisers. Topics will range from galley prep to weather systems to onboard electronics and navigation and more. See the full lineup of courses and register online. Annapolis. 410-263-7802; www.usboat.com.

26-29 

Delmarva Birding Weekend

Birding enthusiasts can participate in boat trips, hikes and paddling treks across the Delmarva peninsula to catch a glimpse of the more than 400 species of migratory and local shorebirds, waterfowl, songbirds and raptors found on the Eastern Shore this time of year. 443-
944-8097; delmarva-almanac.com.

27-29 

Ward World Wildfowl Carving Championship    

This premier carving event features wildfowl carvings, artwork, demonstrations, classes, lectures, auctions and much more. Roland E. Powell Convention Center, Ocean City, Md. Fri. 10 a.m.-5 p.m.; Sat. 9 am.-5 p.m.; Sun. 10 a.m.-4 p.m. 410-742-4988; www.wardmuseum.org. 

28 

Oxford Day

This annual celebration in the historic town of Oxford, Md., features a parade, crab races, boat rides, a dog show, activities at the Cooperative Oxford Lab, children's activities, raffles, lots of food and live music. Oxford, Md. 8 a.m.-6 p.m., parade at 11 a.m.; www.oxfordday.org.

28 

Low Country Shrimp Boil

The Cape Charles Historical Society hosts this annual shrimp boil with lots of great shrimp and seafood, live music and more. Cape Charles Museum, Cape Charles, Va. 5-9 p.m. 757-331-1008; ccmuseum@hughes.net.

28-29 

Winefest at St. Michaels    


This annual food and wine festival will bring Bay foodies to St. Michaels, Md., for distinctive food and wine, cooking demonstrations, seminars and entertainment. St. Michaels, Md. 443-205-2185; www.winefestatstmichaels.com.  

28-29 

Annapolis Nautical Flea Market  

Find used boating equipment, nautical items and for-sale-by-owner boats at this annual flea market, hosted by U.S. Yacht Shows. City Dock, Annapolis. Sat. 9 a.m.-5 p.m.; Sun. 9 a.m.-3 p.m. 410-268-8828; www.usboat.com.

Through May 27 

Apprentice For a Day

Join museum boatbuilders as they construct a model of the Miss B, a North Shore sailing skiff. For the complete schedule, and to register, visit www.cbmm.org