He therefore was made commander of the Dutch fleet on 11 August 1665, as Lieutenant-Admiral (a rank he at the time shared with six others) of the Amsterdam admiralty.
Prin urmare, a fost numit comandant al flotei olandeze pe 11 august 1665, ca locotenent-amiral (un grad pe care la acea vreme îl împărțea cu alți șase) al Amiralității din Amsterdam.