You can tour the Port of Baltimore tomorrow and Sunday, seeing massive ships up close and delving firsthand into the city's maritime world and history. Portfest '93 is the name of this new -- mostly free -- event produced by Baltimore Operation Sail. Some details:
* Move around by land or water. Look for Portfest signs.
By land, free MTA buses will arrive at each of six stops every 20 minutes from 10 a.m. to 6 p.m. each day -- two stops at the Inner Harbor, along with Fells Point, the Canton Waterfront Park, the Dundalk Marine Terminal and the Baltimore Museum of Industry. You can tour by car, of course, but why hassle with parking?
By water, ride free on the Baltimore Sentinel, which will shuttle visitors to and from the Inner Harbor and Dundalk Marine Terminal from 10:30 a.m. to 6 p.m. tomorrow and from 11 a.m. to 5 p.m. Sunday. Or take a water taxi; they'll be charging reduced rates.
* Take a mini-tour or two via the Maryland Port Administration's open house at Dundalk Marine Terminal from 10 a.m. to 6 p.m. tomorrow and from 11 a.m. to 5 p.m. Sunday.
U.S. Customs, Canton Railroad Co. and Conrail will be among 44 exhibitors. Attractions include a yard hustler -- a large transport vehicle used on the docks. Baltimore Packaging Corp. will be showing off a shrink-wrap machine, a contraption that secures over-size cargo for shipping. And the Middle River Volunteer Fire and Rescue Squad's underwater rescue team will be in the water demonstrating rescue procedures.
Plus, the Seagirt Marine Terminal will be open to visitors tomorrow and Sunday with buses leaving from the Dundalk Passenger Terminal. Tours of the U.S. Naval Hospital Ship Comfort, berthed at Piers 10 and 11 near the Seagirt Marine Terminal, will be offered from noon to 6 p.m. tomorrow only.
In addition, leaving from the Baltimore Museum of Industry at 1415 Key Highway, a mini-tour of South Locust Point will include stops at Fort McHenry and the Domino Sugar Refinery.
* Celebrate a birthday -- the Pride of Baltimore II marks five years as the city's goodwill ambassador. Grab a piece of cake and then tour the ship, which will be open to visitors until 5 p.m. today at the Harborplace Amphitheater.
* Wine and dine. On Sunday, the Baltimore Museum of Industry will have food and beverages available to go with demonstrations of horseradish-making, candy-making and oyster-shucking at Bounty on the Bay. Hours: 11 a.m. to 5 p.m. Sunday. Entertainment will be provided by the Swanee River Ragtime Band, the Maryland Heritage Vocal Ensemble and folk singer Christopher Fox. Admission: $6 for adults, $3 for children under 12. Children under 6 are admitted free. Information: 727-4808.
* Commemorate our collective past. "Baltimore as a Port of Entry: Our Immigrant Heritage" will be displayed this weekend at the Broadway Pier in Fell's Point. The exhibit includes photographs, diaries and other artifacts from the thousands of European immigrants who entered Baltimore through Locust Point. Information: 732-8155.
* Go to market -- Lexington Market, for the Market Center Seafood Jamboree from 11 a.m. to 7 p.m. tomorrow. Besides crabs, oysters, clams and other tasty treats from the bay, you're apt to hear blues and Caribbean music. Information: 837-4636. Stroll through a colorful exhibit of illustrated children's books, paintings and drawings by 10 African-American women artists from 2 p.m. to 4 p.m. tomorrow at the Peale Museum, 225 Holliday St. "Tales and Treasures" is offered in conjunction with the museum's current exhibit, "Through Sisters' Eyes: Children's Books Illustrated by African-American Women Artists." Free. Information: 396-1149 weekdays and 396-4545, weekends.