Complex sentence: While in the course of her homeward voyage, at 1913 on the 4th, she sighted red signal rockets off her port bow and, two minutes later, went to general quarters, changing course toward the direction of the rockets.
Split into simpler sentences: While in the course of her homeward voyage, at 1913 on the 4th, she sighted red signal rockets off her port bow. Two minutes later she went to general quarters, changing course toward the direction of the rockets.