On the morning of 7 May, Tegetthoff's ships spotted the British frigate off the island of Heligoland; after Tegetthoff closed to determine that "Aurora" was a neutral warship, he took his squadron to anchor off the island of Sylt. "Aurora", commanded by Francis Leopold McClintock, encountered Suenson's squadron the next day. McClintock informed Suenson of the last known location of the Austro-Prussian squadron. In the meantime, Tegetthoff had proceeded further to Cuxhaven, at the mouth of the Elbe, to replenish his fuel stores.