Operating in international waters between Italy and Libya the SOS Méditerranée NGO rescue ship Aquarius, in partnership with Médecins Sans Frontières, has saved more than 27,000 people over the past two years. The MSF medical team on board the ship treats rescued people for dehydration, hypothermia and chemical burns to skin as a result of fuel mixing with sea water in boats. Filip Warwick has this report from aboard the Aquarius