Portrait of a Uros Indian woman on a traditional reed boat, Islas Flotantes, floating islands, Lake Titicaca, Peru, South America

Barge on waterway, the Backwaters, Kerala, India

Traditional row boat training for lifesaving, Bondi Beach, New South Wales (N.S.W.), Australia, Pacific

The National Geographic Endeavour pushing through brash ice and small icebergs in the Lemaire Channel near the Antarctic Peninsula.

The National Geographic Endeavour pushing through brash ice and small icebergs in the Lemaire Channel near the Antarctic Peninsula.

Gray whale (Eschrichtius robustus). A gray whale uses its head to push a small tourist boat around. Mexico.

The National Geographic Endeavour pushing through brash ice and small icebergs in the Lemaire Channel near the Antarctic Peninsula.

The National Geographic Endeavour breaking through new fast ice around the Antarctic Peninsula. Note the orange hull paint left on the ice where the bow has pushed through.

Fishermen shifting boat onto the volcanic beach, Punta de Fuencaliente, La Palma, Canary Islands, Atlantic Ocean, Spain

Row of houses on the bank of the river Rhine at Laar, in front of ThyssenKrupp steel works Meiderich/Beek, Duisburg, NRW, Germany

Vietnamese fisherman bringing in his basket boat, beach at Mui Ne, Vietnam, Southeast Asia, Asia

Sailboats and motor boats on the Nord-Ostsee-Kanal, Kiel Canal, Kiel, Schleswig-Holstein, Germany, Europe

Aerial photo, ThyssenKrupp Steel steel mill, inland waterway, port Schwelgern, ore push tows, Binsheim, Duisburg, Rhine floodplains, Ruhrgebiet region, North Rhine-Westphalia, Germany, Europe

Fishermen pushing their fishing boat into the sea, Somatheeram Beach, Malabarian Coast, Malabar, Kerala state, India, Asia

Fishermen pushing their fishing boat into the sea, Somatheeram Beach, Malabarian Coast, Malabar, Kerala state, India, Asia

Military helicopter on a pushing unit on the rhine

Fishermen pushing their fishing boat into the sea, Somatheeram Beach, Malabarian Coast, Malabar, Kerala state, India, Asia

House boat on the river 'Steyr' in Upper Austria, Europe

Fishermen pushing their fishing boat into the sea, Somatheeram Beach, Malabarian Coast, Malabar, Kerala state, India, Asia

Fishermen on Koh Lanta Island in Thailand push Boat to Shore

Rafters make their way through Class IV rapids outside of Queenstown on the South Island of New Zealand.

China, Li River, near Yangshou, Local men floating on bamboo raft.