HMS Emerald (1795) dispatched a squadron of five ships, including "Emerald" and commanded by Nelson in the 74-gun , to locate a large invasion fleet that had left Toulon. After receiving intelligence on 22 May, Nelson correctly predicted the French fleet's destination and set course for Alexandria where the British captured or destroyed all but two of the French ships at the Battle of the Nile, which occurred between 1–3 August 1798. "Emerald" missed the battle; having previously become separated from the rest of the squadron in a storm on 21 May, she arrived at Aboukir Bay on 12 August. When Nelson left
Mediterranean campaign of 1798 month and presented Troubridge with a French merchant ship that was anchored in the harbour. With their first definite sighting of the French, the British fleet turned southwards towards Alexandria. On 1 August, Nelson's fleet reached the Egyptian coast, the ships HMS "Swiftsure" and HMS "Alexander" detached as scouts to investigate Alexandria harbour. Although the transport fleet was observed in the harbour, the French battle fleet was not. Despite initial disappointment, Nelson ordered his ships to search the coastline, and at 14:00 lookouts on HMS "Zealous" reported the French anchored in line of battle in Aboukir Bay. Brueys believed that