SAN DIEGO—No. 3 Notre Dame got off to an inauspicious start against Navy when top receiver Miles Boykin fumbled after a catch on the first play from scrimmage.Book threw for 330 yards and two touchdowns, and Dexter Williams ran for 142 yards and three scores.Notre Dame is 8-0 for the first time since 2012, when it remained undefeated until being routed by Alabama in the BCS national title game.ND had 584 yards of total offense as it extended its dominance in the oldest continual intersectional rivalry to 78-13-1.Playing in San Diego for the first time, Notre Dame used its superior size and talent to take a 27-0 lead just before halftime. While the defense kept Navy’s triple option in check, Book kept the Midshipmen off-balance with lots of play-action. He completed 27 of 33 passes, to 10 receivers. He threw one interception.Book, from El Dorado Hills near Sacramento, improved to 5-0 since replacing Brandon Wimbush as the starter. Book threw touchdown passes of 4 and 22 yards to Boykin to in the second half.Notre Dame did that by scoring on four of its next five possessions. JaFar Armstrong had a 1-yard scoring run, and Williams then had touchdown runs of 12, 9 and 2 yards. Williams carried 23 times.Navy (2-6), which lost its fifth straight, finally broke through thanks to some big plays that led to Zach Abey scoring two 1-yard touchdowns in the third quarter. Book was intercepted early in the fourth quarter, setting up a 33-yard touchdown run by Mike Martin.Malcolm Perry had 133 yards on 12 carries.The game, which drew a crowd of 63,626 to SDCCU Stadium, was promoted by the San Diego Bowl Game Association.