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Ships

Ships of the East India Company were called East Indiamen or simply "Indiamen". Their names were sometimes prefixed with the initials "HCS", standing for "Honourable Company's Service" or "Honourable Company's Ship", such as HCS Vestal (1809) and HCS Intrepid (1780).

During the French Revolutionary and Napoleonic Wars, the East India Company arranged for letters of marque for its vessels such as Lord Nelson. This was not so that they could carry cannon to fend off warships, privateers, and pirates on their voyages to India and China (that they could do without permission) but so that, should they have the opportunity to take a prize, they could do so without being guilty of piracy. Similarly, the Earl of Mornington, an East India Company packet ship of only six guns, also sailed under a letter of marque.

In addition, the company had its own navy, the Bombay Marine, equipped with warships such as Grappler. These vessels often accompanied vessels of the Royal Navy on expeditions, such as the Invasion of Java.

At the Battle of Pulo Aura, which was probably the company's most notable naval victory, Nathaniel Dance, Commodore of a convoy of Indiamen and sailing aboard the Warley, led several Indiamen in a skirmish with a French squadron, driving them off. Some six years earlier, on 28 January 1797, five Indiamen, Woodford, under Captain Charles Lennox, Taunton-Castle, Captain Edward Studd, Canton, Captain Abel Vyvyan, Boddam, Captain George Palmer, and Ocean, Captain John Christian Lochner, had encountered Admiral de Sercey and his squadron of frigates. On this occasion the Indiamen succeeded in bluffing their way to safety, and without any shots even being fired. Lastly, on 15 June 1795, General Goddard played a large role in the capture of seven Dutch East Indiamen off St Helena.

East Indiamen were large and strongly built, and when the Royal Navy was desperate for vessels to escort merchant convoys, it bought several of them to convert to warships. Earl of Mornington became HMS Drake. Other examples include:

Their design as merchant vessels meant that their performance in the warship role was underwhelming and the Navy converted them to transports.