On Thursday afternoon, after a suitable send off, the SA Agulhas will weigh anchor and slip beneath Tower Bridge on its way to the world's coldest continent.
BBC: Sir Ranulph Fiennes' 'coldest journey' begins
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Aboard the SA Agulhas is a giant crane.
BBC: Sir Ranulph Fiennes' 'coldest journey' begins
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Phase one of The Coldest Journey expedition - which aims to raise millions of pounds in donations for the Seeing is Believing charity to tackle avoidable blindness - begins later when the icebreaker SA Agulhas sets off from the River Thames.
BBC: Sir Ranulph Fiennes' 'coldest journey' begins