Aaron Wiggins added 14 points and a career-best six assists for Maryland (2-0), including a dish to Galin Smith for an emphatic dunk, part of a 23-11 run to open the second half. Wiggins capped the stretch scoring eight straight points and the Terrapins led 55-36 with 10 minutes left.
It was Maryland's 12th straight win over Navy dating to 1970, and the first played in College Park, Maryland since 1983.
Smith finished with 12 points and Hakim Hart had a career-high 11 for the Terrapins, who shot 68% from the floor including 8 of 15 from 3-point range. Morsell and Smith were each 6-of-6 shooting from the floor. Ayala and Wiggins made three 3-pointers apiece.
Cam Davis scored 10 points to lead Navy (1-1). Davis is 17 points shy of a career 1,000.
The Terps hold a 32-27 advantage in the series that started in the 1924-25 season.
Maryland coach Mark Turgeon announced Friday that James Graham III, a 6-8 guard/forward from Milwaukee, will graduate Nicolet High School early and join the program later this season. As a junior last year, he averaged 20.3 points and 6.6 rebounds while leading the team to a 22-2 record.
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