This was when Arabia was wetter than today, but the Red Sea crossing was wider.

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Many migrants are caught and some drown while attempting to make the sea crossing.

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This is where the sea crossing begins.

BBC: Last Updated: Wednesday, 16 January 2008, 12:19 GMT

By comparison, China's 36 kilometer (22 mile) Hangzhou Bay Bridge, the world's longest sea-crossing bridge, over seven times the length of the Mumbai bridge, took four years to get completed.

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The crew has deployed about 57 floats in 2011 for CSIRO and have taken some risks at sea for Argo, crossing storms, tropical cyclones.

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Only a year after the Tay Bridge was completed, it collapsed during a storm while a passenger train carrying an estimated 75 people was crossing, plunging the train into the sea below and killing all on board.

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The naval forces and the shipping industry have worked together to advise ship operators and captains crossing the Gulf of Aden and the Arabian Sea on how they should prepare their vessels and crews for the pirate threat.

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Following the Israeli sea-born raid, Egyptian President Hosni Mubarak ordered the border crossing between Egypt and the Gaza Strip to be opened.

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While crossing the Gulf of Aden -- a waterway in the Arabian Sea notorious for kidnapping and hijacking -- Domjan faced little choice but to recruit six French soldiers for protection.

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Her boat, American Pearl, upended in the rough conditions and tipped her into the sea - forcing the rower to relive her memories of being rescued after her unsuccesful 1998 attempt on the crossing when Hurricane Danielle capsized her 15 times.

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