Basic Marine Electronics Seminar
This Chesapeake Area Professional Captains Association seminar will discuss the basics of AC and DC current on boats, as well as grounding and ground fault protection requirements. Annapolis Elks Lodge #622, Edgewater, Md. 9 a.m.-5 p.m.
Project Clean Stream
Help the Alliance for the Chesapeake Bay clean up streams and rivers along the Bay watershed. Call for details and specific locations. 9 a.m.-noon.
Potomac River Cleanup
This annual Bay cleanup program will take place at over 300 sites in the Potomac River watershed. Call for site information. Potomac River, 9 a.m.-noon.
Blackwater Cleanup Day
Volunteer a little time to help pick up litter and debris in preparation for the summer. Blackwater National Wildlife Refuge, Cambridge, Md. 9 a.m.-3 p.m. 410-901-6124; www.fws.gov/refuge/Blackwater.
Rock & Roast Fundraiser
Feast on oysters, groove to local bands and raise money for the Box of Rain Foundation, an at-risk-youth sailing program. Metropolitan Kitchen & Lounge, Annapolis. 6-10 p.m. 443-254-0024; www.boxofrain.org.
Stroll the lively streets of Cambridge, Md., during its monthly downtown evening of fun events, gallery receptions, special dinners and sales. Downtown Cambridge, Md. 5-9 p.m. 443-477-0843; www.cambridgemainstreet.com.
Tiki Bar Opening Day
This raucous party marks the beginning of the boating season at the Tiki Bar in Solomons, Md. Noon. www.tikibarsolomons.com.
Betterton Beach Cleanup
Help clean up Betterton Beach for the upcoming season. Preregistration required. Betterton Beach, Md.
9 a.m.-noon. 410-810-5948; www.kentparksandrec.org.
Clean up the Susquehanna's shores with friends and neighbors. 410-457-2482; www.upperbaytrails.com.
Whitehouse Cove Marina Open House
Check out a wide selection of new boats and paddle boards, along with food, music and more. Whitehouse Cove Marina, Poquoson, Va. 1-5 p.m. 757-508-2602; www.whitehousecovemarina.com.
Boatyard Bar & Grill Spring Fishing Tournament
Kick off rockfish season at this annual fundraising catch-and-release tournament to raise money for local charities. In addition to a day of great fishing, there will be a fun after-tournament party with great prizes and entertainment. Boatyard Bar & Grill, Annapolis. Fish weigh-in by 4:30 p.m., party 4-8 p.m., award ceremony 5 p.m. 410-216-6206; www.boatyardbarandgrill.com.
Get your pirate on with swashbuckling fun for the whole family, including pirate re-enactors, dockside ship tours and pirate ship cruises, a craft market, food, lots of live entertainment and a live "sea battle" between schooners on the water. Fells Point, Baltimore. Sat. 10 a.m.-7 p.m.; Sun. 10 a.m.-6 p.m. 410-675-8900; www.fellspointmainstreet.org.
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.
Blessing of the Fleet
Welcome the boating season with a ceremony blessing the Chesapeake Bay Maritime Museum's fleet of historic vessels and other boats along the Miles River. Chesapeake Bay Maritime Museum, 5 p.m.
Weekend Join other birding enthusiasts in this weekend full of boat trips, hikes and paddling treks across the Delmarva peninsula. The weekend aims to give birders great opportunities to view some of the more than 400 species of migratory and local shorebirds, waterfowl, songbirds and raptors migrating north along the Eastern Shore this time of year. 410-632-3110; delmarvabirding.org.
Angel Lantern Lights
Captains Sharing and Caring is hosting a special event at the Pier 6 Pavilion in Baltimore next Friday, April 24th. To honor parents who have lost children, the group will be lighting Chinese lanterns and launching them on the water at dusk. If you know of someone who has lost a child, or would like to help out with the event, see the full details here: https://www.facebook.com/events/417873838394460/
Working Watermen's Weekend
This weekend of fun is the museum's official season opener-starting Friday night with the Shrimp & Barbecue gala and dance, then continuing Saturday with creek rides, classic workboat exhibits, a car show, the Deltaville Farmer's Market (9 a.m.-2 p.m.) and the first Groovin' in the Park concert (5-8 p.m.). Deltaville Maritime Museum and Holly Point Nature Park, Deltaville, Va. 804-776-7200; www.deltavillemusum.com.
Ward World Wildfowl Carving Championship
This annual carving competition and exhibition features wildfowl carvings, artwork, demonstrations, classes, lectures, auctions, children's activities and 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.
Crab races, boat rides, a dog show, a parade, demonstrations at the Cooperative Oxford Lab, children's activities, raffles, lots of food and live music mark this annual small town celebration. Oxford, Md. 8 a.m.-
6 p.m., parade at 11 a.m.; www.oxfordday.org.
Boaters' Boot Camp
Learn boating basics from the pros at Deltaville Yachting Center. Deltaville, Va. 8:30 a.m.-4 p.m.
Low Country Shrimp Boil
The Cape Charles Historical Society hosts this annual shrimp boil with lots of great shrimp and seafood, live music, an auction and more. Email for tickets. Cape Charles Museum, Cape Charles, Va. 5-9 p.m.
Pirates Invade Yorktown
Visit a pirate encampment, watch cannon firing demonstrations and sing with pirates during this weekend of pirate-themed fun. Riverwalk Landing, Yorktown, Va. 10 a.m.-6 p.m. 757-890-3500; www.visityorktown.org.
Winefest at St. Michaels
Eat, drink and be merry at this annual festival, featuring great food and wine, cooking demonstrations, seminars and entertainment. St. Michaels, Md. 10 a.m.-5 p.m. 443-205-2185; www.winefestatstmichaels.com.
Partners in Command
The Annapolis Sail and Power Squadron has designed this seminar to provide essential information to crewmembers new to boating, including teaching how to assist a skipper in the safe operation of a recreational boat, and how to respond to emergencies. Bacon Sails, Annapolis. 7-9 p.m. 410-263-4880; www.aspsmd.org.