Where to sail for migrant rescue missions?published at 09:19 Greenwich Mean Time 8 January 2018
This weekend saw the first casualties of 2018 in the Mediterranean, as a dinghy carrying migrants to Europe sank off the coast of Libya.
Johannes Bayer is head of mission for Sea-Watch 3, a boat which is part of an NGO which operates rescue missions in the Mediterranean.
He tells BBC Newsday how they decide where to sail: