The $300 million, 120 metre superyacht 'A', owned by 36 year old Russian billionnaire Andrey Melnichenko, berths in Valletta's Grand Harbour in this September 25, 2008 file picture. Multi-million-dollar superyachts sailing from the Indian Ocean to the Mediterranean for the European summer could be the next high-profile target of Somali pirates, security experts say. The megayachts, many measuring more than 100 metres (330 feet) and owned by some of the world's wealthiest people, tend to spend the northern hemisphere winter in the Indian Ocean or the Caribbean before relocating to the Mediterranean. Picture taken September 25, 2008.