He was knighted and raised to Vice-Admiral of the Blue on the accession of William III of England and led the Blue Squadron in the rear division in the Battle of Beachy Head against the French Navy on 10 July 1690. Delaval was promoted to Vice-admiral of the Red in 1692.
Delaval received knighthood and became Vice-Admiral of the Blue upon William III's accession, commanding the Blue Squadron in a naval engagement against the French Navy on July 10, 1690. In 1692, Delaval was promoted to Vice-Admiral of the Red.