The close distance between these islands and the African mainland has caused people smuggling organisations to employ boats and rafts otherwise hardly seaworthy, generally vastly filled above their capacity. Official reports list boats filled up to 2 or 3 times nominal capacity, including the use of rubber dinghies. This has led to several accidents at sea, as in 2007, the 2009, the 2011, the 2013, 2015. These accidents have become harder to document between 2014 and 2017, as people smuggling organisations changed their tactics: instead of aiming for a full crossing of the sea towards Lampedusa, their boats aimed just to exit Libyan territorial waters and then trigger rescue operation from passing mercantile vessels, seek and rescue organisations, Italian and Maltese coastguards and militaries. As per the United Nations Convention of the Sea, of which Italy is a subscriber, people rescued at sea have to be transported to the closest safe harbor: as Libya continues to be in political turmoil this means they are transported to Italy.