Ocean was an English merchant ship and whaler built in 1794 at South Shields, England. She performed two voyages as an "extra" ship for the British East India Company (EIC) and later, in 1803, she accompanied HMS Calcutta to Port Phillip (Melbourne). The vessels supported the establishment of a settlement under the leadership of Lt Col David Collins. Calcutta transported convicts, with Ocean serving to transport supplies. When the settlers abandoned Port Phillip, Ocean, in two journeys, relocated the settlers, convicts and marines to the River Derwent (Hobart Town) in 1804.