BBC Security Correspondent Frank Gardner
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BBC correspondent's pirate sighting aboard tanker

10 March 2012 Last updated at 15:45 GMT

NATO and other navies operating off the coast of Somalia have warned of a recent increase in pirate attacks there.

Warships are trying to protect international convoys through the pirate-prone Gulf of Aden.

BBC Security Correspondent Frank Gardner is travelling on a merchant tanker sailing all the way through this area, bound for Suez via the Gulf of Aden.