eorgetown's 12-game winning streak died slowly today in a 3 1/2-hour, 9-7 loss to Navy.

The Midshipmen (21-8-2) prevailed largely because of a seven-run fourth inning in which they had one solid single, three scratch hits and five walks, while also benefiting from four wild pitches and a passed ball.

The victory gave Navy the unofficial area championship; it beat its five local rivals--Georgetown, George Washington, Maryland, American and George Mason--by a combined score of 59-20.

Georgetown (16-12-1) carried a 4-1 lead into the fourth. When freshman right-hander Doug Starcher walked the first batter, Coach Ken Kelly came out to talk.

By the time Kelly walked out again, to yank Starcher, Navy was ahead, 5-4, taking advantage of four more walks, a bloop single and an infield hit. Tom Baker, who dropped the blooper into right, came around on three wild pitches.

Mike Nichols greeted reliever Sal Vitiello with a two-run single to center, the only solid hit of the inning, and Bart Rowe hit a pop fly that fell in short left to make it 8-4.

When Vitiello retired Navy's 12th batter to end the inning, the game was 2 hours 5 minutes old.

Navy's first two pitchers had their problems, too, but the third pitcher, Steve Cochran, struck out six.