DETROIT — Faced with the task of trying to contain Navy's top-ranked run offense, the last thing Eastern Michigan expected it would have to do yesterday was defend the pass.

But Navy unleashed an aerial attack that amassed a season-high 151 yards, helping produce a 49-21 victory at Ford Field.

Kaipo-Noa Kaheaku-Enhada accounted for much of the Midshipmen's offense, running for four touchdowns and throwing for two more. Eric Kettani, who ran for 91 of Navy's 323 rushing yards, added a 7-yard scoring run.

"We went out there and we had fun — we went out there and we played," said Kaheaku-Enhada, a Kapolei High alum, whose performance tied the second most touchdowns in a game in school history. "That's what we have to do week to week if we want to win our games."

The sophomore quarterback, making only his third career start, engineered six straight scoring drives, providing Navy (7-3) with a commanding lead by halftime. He scored on a pair of 1-yard plunges to go along with scoring runs of 9 and 5 yards and finished with 151 passing yards, connecting on seven of his nine pass attempts.

Navy scored touchdowns on all seven offensive series that Kaheaku-Enhada played — a solid showing for a quarterback who started the season third on the depth chart before becoming the starter when Brian Hampton was injured earlier this season against Rutgers.

"I thought he did some nice things," Navy coach Paul Johnson said. "We did a pretty good job of giving him time to throw, and when we did that, he was able to complete them."

Navy jumped out to a 28-0 lead on Kaheaku-Enhada's 29-yard touchdown strike to Tyree Barnes with 2:01 remaining in the second quarter. That capped a dominant half in which the Midshipmen rolled up 282 of their 474 yards of total offense.

Eastern Michigan (1-9) put up its only first-half points on Andy Schmitt's 2-yard quarterback keeper with 6 seconds remaining in the second quarter.

The Eagles cut into Navy's lead after recovering an onside kick on the second-half kickoff. Tyler Jones finished off a short drive with a 5-yard run, making it 28-14.

But Eastern Michigan again doomed itself with turnovers. Schmitt threw a pair of interceptions and Terrence Blevins fumbled — all miscues that led to Navy touchdowns.

The Eagles' offensive woes proved especially costly considering the difficulty Eastern Michigan had in figuring out Navy's triple-option offense.

"Until you can figure out their offense, you have to score," Eastern Michigan coach Jeff Genyk said. "You have to score on almost every possession — at least every other possession."

Eastern Michigan didn't do either, waiting till the fourth quarter to score its third touchdown on Jones' 3-yard run that made it 42-21. Navy wasted no time in extending its lead again when Kaheaku-Enhada scored his fourth touchdown.