Experiential agency Capitalise is responsible for organising the three-day event at which the public can climb the 110ft mast to gain some insight into what it would be like to be in the Volvo Ocean Race.
Puma has a boat competing in the round-the-world race, which started in Spain in October 2008 and will end in Stockholm in June.
"Today was an excellent showcase for our launch into sailing here in the UK, and marks the start of an exciting three days in London," said Puma lifestyle manager Sean Casey. "With our team competing in the Volvo Ocean Race on the other side of the world it's a great opportunity for the public to come and experience what those 11 men at sea are going through."
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