Ships anchored in the Black Sea await to enter the Sulina canal, one of the spilling points of the river Danube to the Black Sea in Sulina, south-eastern Romania, on June 8, 2022. - In the Ukrainian port of Izmail, on the Danube river that marks the border with Romania, rows of trucks stand in line, filled with grain. Dozens of kilometres (miles) from there, at Romania's port of Sulina, where the river flows into the Black Sea, ships are seen waiting to be loaded. Sailors say there have never been so many ships of all kinds and under so many flags dotting the horizon at Sulina. They are waiting to reach Ukraine to be loaded with food -- ever since Moscow's blockade of its neighbour's seaports has paralysed grain exports from one of the world's largest producers. (Photo by Daniel MIHAILESCU / AFP)

Ships anchored in the Black Sea await to enter the Sulina canal, one of the spilling points of the river Danube to the Black Sea in Sulina, south-eastern Romania, on June 8, 2022. - In the Ukrainian port of Izmail, on the Danube river that marks the border with Romania, rows of trucks stand in line, filled with grain. Dozens of kilometres (miles) from there, at Romania's port of Sulina, where the river flows into the Black Sea, ships are seen waiting to be loaded. Sailors say there have never been so many ships of all kinds and under so many flags dotting the horizon at Sulina. They are waiting to reach Ukraine to be loaded with food -- ever since Moscow's blockade of its neighbour's seaports has paralysed grain exports from one of the world's largest producers. (Photo by Daniel MIHAILESCU / AFP)

Ships anchored in the Black Sea await to enter the Sulina canal, one of the spilling points of the river Danube to the Black Sea in Sulina, south-eastern Romania, on June 8, 2022. - In the Ukrainian port of Izmail, on the Danube river that marks the border with Romania, rows of trucks stand in line, filled with grain. Dozens of kilometres (miles) from there, at Romania's port of Sulina, where the river flows into the Black Sea, ships are seen waiting to be loaded. Sailors say there have never been so many ships of all kinds and under so many flags dotting the horizon at Sulina. They are waiting to reach Ukraine to be loaded with food -- ever since Moscow's blockade of its neighbour's seaports has paralysed grain exports from one of the world's largest producers. (Photo by Daniel MIHAILESCU / AFP)

Ships anchored in the Black Sea await to enter the Sulina canal, one of the spilling points of the river Danube to the Black Sea in Sulina, south-eastern Romania, on June 8, 2022. - In the Ukrainian port of Izmail, on the Danube river that marks the border with Romania, rows of trucks stand in line, filled with grain. Dozens of kilometres (miles) from there, at Romania's port of Sulina, where the river flows into the Black Sea, ships are seen waiting to be loaded. Sailors say there have never been so many ships of all kinds and under so many flags dotting the horizon at Sulina. They are waiting to reach Ukraine to be loaded with food -- ever since Moscow's blockade of its neighbour's seaports has paralysed grain exports from one of the world's largest producers. (Photo by Daniel MIHAILESCU / AFP)

Piloted by Romanian navigation personnel, two ships enter the Sulina canal, one of the spilling points of the river Danube to the Black Sea, in Sulina, south-eastern Romania, on June 8, 2022. - In the Ukrainian port of Izmail, on the Danube river that marks the border with Romania, rows of trucks stand in line, filled with grain. Dozens of kilometres (miles) from there, at Romania's port of Sulina, where the river flows into the Black Sea, ships are seen waiting to be loaded. Sailors say there have never been so many ships of all kinds and under so many flags dotting the horizon at Sulina. They are waiting to reach Ukraine to be loaded with food -- ever since Moscow's blockade of its neighbour's seaports has paralysed grain exports from one of the world's largest producers. (Photo by Daniel MIHAILESCU / AFP)

Ships anchored in the Black Sea await to enter the Sulina canal, one of the spilling points of the river Danube to the Black Sea in Sulina, south-eastern Romania, on June 8, 2022. - In the Ukrainian port of Izmail, on the Danube river that marks the border with Romania, rows of trucks stand in line, filled with grain. Dozens of kilometres (miles) from there, at Romania's port of Sulina, where the river flows into the Black Sea, ships are seen waiting to be loaded. Sailors say there have never been so many ships of all kinds and under so many flags dotting the horizon at Sulina. They are waiting to reach Ukraine to be loaded with food -- ever since Moscow's blockade of its neighbour's seaports has paralysed grain exports from one of the world's largest producers. (Photo by Daniel MIHAILESCU / AFP)

Ships anchored in the Black Sea await to enter the Sulina canal, one of the spilling points of the river Danube to the Black Sea in Sulina, south-eastern Romania, on June 8, 2022. - In the Ukrainian port of Izmail, on the Danube river that marks the border with Romania, rows of trucks stand in line, filled with grain. Dozens of kilometres (miles) from there, at Romania's port of Sulina, where the river flows into the Black Sea, ships are seen waiting to be loaded. Sailors say there have never been so many ships of all kinds and under so many flags dotting the horizon at Sulina. They are waiting to reach Ukraine to be loaded with food -- ever since Moscow's blockade of its neighbour's seaports has paralysed grain exports from one of the world's largest producers. (Photo by Daniel MIHAILESCU / AFP)

Romanian navigation personnel on a pilot vessel oversees a ship previously anchored on the Black Sea now preparing to enter the Sulina canal, one of the spilling points of the river Danube to the Black Sea in Sulina, south-eastern Romania, on June 8, 2022. - In the Ukrainian port of Izmail, on the Danube river that marks the border with Romania, rows of trucks stand in line, filled with grain. Dozens of kilometres (miles) from there, at Romania's port of Sulina, where the river flows into the Black Sea, ships are seen waiting to be loaded. Sailors say there have never been so many ships of all kinds and under so many flags dotting the horizon at Sulina. They are waiting to reach Ukraine to be loaded with food -- ever since Moscow's blockade of its neighbour's seaports has paralysed grain exports from one of the world's largest producers. (Photo by Daniel MIHAILESCU / AFP)

Romanian navigation personnel on a pilot vessel oversees a ship previously anchored on the Black Sea now preparing to enter the Sulina canal, one of the spilling points of the river Danube to the Black Sea in Sulina, south-eastern Romania, on June 8, 2022. - In the Ukrainian port of Izmail, on the Danube river that marks the border with Romania, rows of trucks stand in line, filled with grain. Dozens of kilometres (miles) from there, at Romania's port of Sulina, where the river flows into the Black Sea, ships are seen waiting to be loaded. Sailors say there have never been so many ships of all kinds and under so many flags dotting the horizon at Sulina. They are waiting to reach Ukraine to be loaded with food -- ever since Moscow's blockade of its neighbour's seaports has paralysed grain exports from one of the world's largest producers. (Photo by Daniel MIHAILESCU / AFP)

Romanian navigation personnel on a pilot vessel oversees a ship previously anchored on the Black Sea now preparing to enter the Sulina canal, one of the spilling points of the river Danube to the Black Sea in Sulina, south-eastern Romania, on June 8, 2022. - In the Ukrainian port of Izmail, on the Danube river that marks the border with Romania, rows of trucks stand in line, filled with grain. Dozens of kilometres (miles) from there, at Romania's port of Sulina, where the river flows into the Black Sea, ships are seen waiting to be loaded. Sailors say there have never been so many ships of all kinds and under so many flags dotting the horizon at Sulina. They are waiting to reach Ukraine to be loaded with food -- ever since Moscow's blockade of its neighbour's seaports has paralysed grain exports from one of the world's largest producers. (Photo by Daniel MIHAILESCU / AFP)

Romanian navigation personnel on a pilot vessel oversees a ship previously anchored on the Black Sea now preparing to enter the Sulina canal, one of the spilling points of the river Danube to the Black Sea in Sulina, south-eastern Romania, on June 8, 2022. - In the Ukrainian port of Izmail, on the Danube river that marks the border with Romania, rows of trucks stand in line, filled with grain. Dozens of kilometres (miles) from there, at Romania's port of Sulina, where the river flows into the Black Sea, ships are seen waiting to be loaded. Sailors say there have never been so many ships of all kinds and under so many flags dotting the horizon at Sulina. They are waiting to reach Ukraine to be loaded with food -- ever since Moscow's blockade of its neighbour's seaports has paralysed grain exports from one of the world's largest producers. (Photo by Daniel MIHAILESCU / AFP)

Romanian navigation personnel on a pilot vessel oversees a ship anchored on the Black Sea waiting to enter the Sulina canal, one of the spilling points of the river Danube to the Black Sea in Sulina, south-eastern Romania, on June 8, 2022. - In the Ukrainian port of Izmail, on the Danube river that marks the border with Romania, rows of trucks stand in line, filled with grain. Dozens of kilometres (miles) from there, at Romania's port of Sulina, where the river flows into the Black Sea, ships are seen waiting to be loaded. Sailors say there have never been so many ships of all kinds and under so many flags dotting the horizon at Sulina. They are waiting to reach Ukraine to be loaded with food -- ever since Moscow's blockade of its neighbour's seaports has paralysed grain exports from one of the world's largest producers. (Photo by Daniel MIHAILESCU / AFP)

Ships anchored in the Black Sea await to enter the Sulina canal, one of the spilling points of the river Danube to the Black Sea in Sulina, south-eastern Romania, on June 8, 2022. - In the Ukrainian port of Izmail, on the Danube river that marks the border with Romania, rows of trucks stand in line, filled with grain. Dozens of kilometres (miles) from there, at Romania's port of Sulina, where the river flows into the Black Sea, ships are seen waiting to be loaded. Sailors say there have never been so many ships of all kinds and under so many flags dotting the horizon at Sulina. They are waiting to reach Ukraine to be loaded with food -- ever since Moscow's blockade of its neighbour's seaports has paralysed grain exports from one of the world's largest producers. (Photo by Daniel MIHAILESCU / AFP)

Romanian navigation personnel on a pilot vessel oversees a ship previously anchored on the Black Sea now entering the Sulina canal, one of the spilling points of the river Danube to the Black Sea in Sulina, Romania, on June 8, 2022. - In the Ukrainian port of Izmail, on the Danube river that marks the border with Romania, rows of trucks stand in line, filled with grain. Dozens of kilometres (miles) from there, at Romania's port of Sulina, where the river flows into the Black Sea, ships are seen waiting to be loaded. Sailors say there have never been so many ships of all kinds and under so many flags dotting the horizon at Sulina. They are waiting to reach Ukraine to be loaded with food -- ever since Moscow's blockade of its neighbour's seaports has paralysed grain exports from one of the world's largest producers. (Photo by Daniel MIHAILESCU / AFP)

Local youth hangs out and fishes by the dock next to a moored ship coming from the Black Sea in the Sulina canal, one of the spilling points of the river Danube to the Black Sea, south-eastern Romania, on June 7, 2022. - In the Ukrainian port of Izmail, on the Danube river that marks the border with Romania, rows of trucks stand in line, filled with grain. Dozens of kilometres (miles) from there, at Romania's port of Sulina, where the river flows into the Black Sea, ships are seen waiting to be loaded. Sailors say there have never been so many ships of all kinds and under so many flags dotting the horizon at Sulina. They are waiting to reach Ukraine to be loaded with food -- ever since Moscow's blockade of its neighbour's seaports has paralysed grain exports from one of the world's largest producers. (Photo by Daniel MIHAILESCU / AFP)

A woman carries bags along a dock where a ship and boats are moored in the Sulina canal, one of the spilling points of the river Danube to the Black Sea, south-eastern Romania, on June 7, 2022. - In the Ukrainian port of Izmail, on the Danube river that marks the border with Romania, rows of trucks stand in line, filled with grain. Dozens of kilometres (miles) from there, at Romania's port of Sulina, where the river flows into the Black Sea, ships are seen waiting to be loaded. Sailors say there have never been so many ships of all kinds and under so many flags dotting the horizon at Sulina. They are waiting to reach Ukraine to be loaded with food -- ever since Moscow's blockade of its neighbour's seaports has paralysed grain exports from one of the world's largest producers. (Photo by Daniel MIHAILESCU / AFP)

People walk by the shore of the Sulina canal in the sunset, one of the spilling points of the river Danube to the Black Sea, in Sulina, south-eastern Romania, on June 7, 2022. - In the Ukrainian port of Izmail, on the Danube river that marks the border with Romania, rows of trucks stand in line, filled with grain. Dozens of kilometres (miles) from there, at Romania's port of Sulina, where the river flows into the Black Sea, ships are seen waiting to be loaded. Sailors say there have never been so many ships of all kinds and under so many flags dotting the horizon at Sulina. They are waiting to reach Ukraine to be loaded with food -- ever since Moscow's blockade of its neighbour's seaports has paralysed grain exports from one of the world's largest producers. (Photo by Daniel MIHAILESCU / AFP)

A motor boat navigates on the water at sunset along the Sulina canal, one of the spilling points of the river Danube to the Black Sea, in Sulina, south-eastern Romania, on June 7, 2022. - In the Ukrainian port of Izmail, on the Danube river that marks the border with Romania, rows of trucks stand in line, filled with grain. Dozens of kilometres (miles) from there, at Romania's port of Sulina, where the river flows into the Black Sea, ships are seen waiting to be loaded. Sailors say there have never been so many ships of all kinds and under so many flags dotting the horizon at Sulina. They are waiting to reach Ukraine to be loaded with food -- ever since Moscow's blockade of its neighbour's seaports has paralysed grain exports from one of the world's largest producers. (Photo by Daniel MIHAILESCU / AFP)

A motor boat navigates on the Sulina canal in the sunset, one of the spilling points of the river Danube to the Black Sea, in Sulina, south-eastern Romania, on June 7, 2022. - In the Ukrainian port of Izmail, on the Danube river that marks the border with Romania, rows of trucks stand in line, filled with grain. Dozens of kilometres (miles) from there, at Romania's port of Sulina, where the river flows into the Black Sea, ships are seen waiting to be loaded. Sailors say there have never been so many ships of all kinds and under so many flags dotting the horizon at Sulina. They are waiting to reach Ukraine to be loaded with food -- ever since Moscow's blockade of its neighbour's seaports has paralysed grain exports from one of the world's largest producers. (Photo by Daniel MIHAILESCU / AFP)

A motor boat navigates on the Sulina canal in the sunset, one of the spilling points of the river Danube to the Black Sea, in Sulina, south-eastern Romania, on June 7, 2022. - In the Ukrainian port of Izmail, on the Danube river that marks the border with Romania, rows of trucks stand in line, filled with grain. Dozens of kilometres (miles) from there, at Romania's port of Sulina, where the river flows into the Black Sea, ships are seen waiting to be loaded. Sailors say there have never been so many ships of all kinds and under so many flags dotting the horizon at Sulina. They are waiting to reach Ukraine to be loaded with food -- ever since Moscow's blockade of its neighbour's seaports has paralysed grain exports from one of the world's largest producers. (Photo by Daniel MIHAILESCU / AFP)

Children play next to the shore of the Sulina canal, one of the spilling points of the river Danube to the Black Sea, in Sulina, south-eastern Romania, on June 7, 2022. - In the Ukrainian port of Izmail, on the Danube river that marks the border with Romania, rows of trucks stand in line, filled with grain. Dozens of kilometres (miles) from there, at Romania's port of Sulina, where the river flows into the Black Sea, ships are seen waiting to be loaded. Sailors say there have never been so many ships of all kinds and under so many flags dotting the horizon at Sulina. They are waiting to reach Ukraine to be loaded with food -- ever since Moscow's blockade of its neighbour's seaports has paralysed grain exports from one of the world's largest producers. (Photo by Daniel MIHAILESCU / AFP)

A sailor watches his mobile device as a ship is moored at a dock at the Sulina canal, one of the spilling points of the river Danube to the Black Sea, in Sulina, south-eastern Romania, on June 7, 2022. - In the Ukrainian port of Izmail, on the Danube river that marks the border with Romania, rows of trucks stand in line, filled with grain. Dozens of kilometres (miles) from there, at Romania's port of Sulina, where the river flows into the Black Sea, ships are seen waiting to be loaded. Sailors say there have never been so many ships of all kinds and under so many flags dotting the horizon at Sulina. They are waiting to reach Ukraine to be loaded with food -- ever since Moscow's blockade of its neighbour's seaports has paralysed grain exports from one of the world's largest producers. (Photo by Daniel MIHAILESCU / AFP)

A ship coming from the Black Sea is moored at a dock, as the border formalities are dealt with, at the Sulina canal, one of the spilling points of the river Danube to the Black Sea, in Sulina, south-eastern Romania, on June 7, 2022. - In the Ukrainian port of Izmail, on the Danube river that marks the border with Romania, rows of trucks stand in line, filled with grain. Dozens of kilometres (miles) from there, at Romania's port of Sulina, where the river flows into the Black Sea, ships are seen waiting to be loaded. Sailors say there have never been so many ships of all kinds and under so many flags dotting the horizon at Sulina. They are waiting to reach Ukraine to be loaded with food -- ever since Moscow's blockade of its neighbour's seaports has paralysed grain exports from one of the world's largest producers. (Photo by Daniel MIHAILESCU / AFP)