PUT 'EM BACK: "Fishing in Maryland," the venerable guide to fresh- and saltwater angling in the Free State, has started a catch-and-release award program with the state Department of Natural Resources.

The annual publication always has listed names of those who catch trophy-size fish each year, based on check-ins at certified weigh stations. This year, it also will recognize in print those who catch trophy fish and turn them loose, based on confirmation by photos or signed affidavits from fishing partners.

Publisher Cary deRussy said the aim is to "give the resource a chance to rebound from obvious overfishing." For details, check page 158 of the 1991 "Fishing in Maryland." TURKEY TROUBLE: Pennsylvania officials are distressed enough by burgeoning turkey hunting accidents there that they've proposed outlawing rifles, setting maximum shot sizes for shotguns and requiring blaze-orange clothing for turkey hunters.

Last year, 46 hunters were shot in Pennsylvania while turkey hunting, four fatally, including three fatalities on opening day of small-game season. In most cases, the victims were mistaken for turkeys, officials said.

Game commission spokesman Lantz Hoffman said turkey hunting is "unique. In no other hunting activity do . . . participants dress in camouflage, take extensive measures to conceal their faces, hands and firearms, and then intentionally emulate the sounds of their quarry. The very nature of turkey hunting . . . creates tremendously increased potential for accidents." BOATING SCENE: The 30th Washington Boat Show winds up today (11 a.m.-7 p.m.) and Monday (same time) at the convention center. Admission is $7 for adults, $3 for kids 6-12; under 6 free. Call (703) 569-7141. . . .

Tania Aebi, the ex-New York bicycle messenger who took off at age 18 on a 2 1/2-year 'round-the-world singlehanded voyage in a 26-foot sloop, has sold out the 600-seat auditorium for her Thursday lecture at St. John's College in Annapolis.

Organizers say Aebi also is sold out in Boston, New York and Fort Lauderdale, the other stops on her four-day, four-city tour. Aebi, who finished her trip in 1988, is the first and only U.S. woman to circumnavigate alone. HEALERS: The Interstate Commission on the Potomac River Basin's new 24-page treatise on the restoration of the Potomac: "Healing a River -- The Potomac, 1940-1990" is available for $2.50 from ICPRB, Suite 300, 6110 Executive Blvd., Rockville, Md. 20852. STRAIGHT FLUSH: Veteran Washington sports publicist Charlie Brotman is crowing about recent successes of his invention Potty-Time, a folding, cardboard toilet he says the military has ordered for use in the Persian Gulf.

Brotman, whose regular business accounts include Sugar Ray Leonard and the Kemper Open, got the idea for the portable latrine when guests complained about lack of facilities on a pontoon boat off Ocean City. He says the $50, eight-pound contraption is ideal for camping and boating. THEN THERE WERE 2: The America's Cup defense field has dropped to two contenders as the Beach Boys Syndicate collapsed last week because of lack of funds.

The Beach Boys group was swallowed up by America 3, the syndicate headed by wealthy industrialist Bill Koch and Maryland's Gary Jobson. America 3 and Cupholder Dennis Conner's Stars & Stripes entry will compete for the right to defend the Cup in May 1992 against the best challenger from a field of up to 11 foreign syndicates. HOLY MACKEREL: Spanish mackerel have been added to the species list eligible for citations in Virginia's annual Saltwater Fishing tournament.

It's the first species added since 1982, when amberjack became eligible. Tournament director Claude Bains said Spanish mackerel have been abundant in the Chesapeake and coastal waters in recent years. Minimum size for a citation mackerel is five pounds.