what was his profession before becoming an explorer?
Merchant Navy officer
Ernest Shackleton
In 1898, Shackleton joined Union-Castle Line, the regular mail and passenger carrier between Southampton and Cape Town. He was, as a shipmate recorded, "a departure from our usual type of young officer", content with his own company though not aloof, "spouting lines from Keats [and] Browning", a mixture of sensitivity and aggression but, withal, sympathetic. Following the outbreak of the Boer War in 1899, Shackleton transferred to the troopship "Tintagel Castle" where, in March 1900, he met an army lieutenant, Cedric Longstaff, whose father Llewellyn W. Longstaff was the main financial backer of the National Antarctic Expedition then being organised in London.
what is farthest south? It is the most  southerly latitude reached by explorers before the conquest of the South Pole in 1911. who led the explorers? Robert Falcon Scott and Ernest Shackleton what is the nationality of the latter? He is Irish can you name any of his expeditions? The "Discovery" expedition, the "Nimrod" expedition what was discovered in the latter? Barrier Inlet did his exploration brought him fame? Commander of the Royal Victorian Order where did he carry out his final expedition? The Antarctic
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Ernest Shackleton [SEP] Merchant Navy officer
In August 1894, he passed his examination for second mate and accepted a post as third officer on a tramp steamer of the Welsh Shire Line. Two years later, he had obtained his first mate's ticket, and in 1898, he was certified as a master mariner, qualifying him to command a British ship anywhere in the world. In 1898, Shackleton joined Union-Castle Line, the regular mail and passenger carrier between Southampton and Cape Town. He was, as a shipmate recorded, "a departure from our usual type of young officer", content with his own company though not aloof, "spouting lines from Keats [and] Browning", a mixture of sensitivity and aggression but, withal, sympathetic.