A person watches as the Zhen Hua 36 heavy lift vessel enters the River Mersey with its cargo of gantry cranes for use at Peel Ports Group Liverpool container port at Crosby, Britain, March 4, 2021. REUTERS/Phil Noble

A person watches as the Zhen Hua 36 heavy lift vessel enters the River Mersey with its cargo of gantry cranes for use at Peel Ports Group Liverpool container port at Crosby, Britain, March 4, 2021. REUTERS/Phil Noble

People watch as the Zhen Hua 36 heavy lift vessel enters the River Mersey with its cargo of gantry cranes for use at Peel Ports Group Liverpool container port at Crosby, Britain, March 4, 2021. REUTERS/Phil Noble

People watch as the Zhen Hua 36 heavy lift vessel enters the River Mersey with its cargo of gantry cranes for use at Peel Ports Group Liverpool container port at Crosby, Britain, March 4, 2021. REUTERS/Phil Noble

Brian Shukan, U.S. Embassy Khartoum Charge de Affairs, Rear Admiral Michael Baze, U.S. navy sixth fleet Director of the Maritime Affairs, and Captain Ibrahim Hammad Al Nayer, stand together as a U.S navy vessel docks in the eastern city of Port Sudan, Sudan March 1, 2021. REUTERS/El Tayeb Siddiq

Rear Admiral Michael Baze, U.S. navy sixth fleet Director of the Maritime Affairs, stands next to Captain Ibrahim Hammad Al Nayer, commander of the fleet of the Port Sudan Naval base, as a U.S navy vessel docks in the eastern city of Port Sudan, Sudan March 1, 2021. REUTERS/El Tayeb Siddiq

Naval officers stand on a U.S navy vessel as it docks in the eastern city of Port Sudan, Sudan March 1, 2021. REUTERS/El Tayeb Siddiq

Naval officers stand on a U.S navy vessel as it prepares to dock in the eastern city of Port Sudan, Sudan March 1, 2021. REUTERS/El Tayeb Siddiq

A U.S navy vessel carrying naval officers is seen at sea as it prepares to dock in the eastern city of Port Sudan, Sudan March 1, 2021. REUTERS/El Tayeb Siddiq

A U.S navy vessel carrying naval officers is seen at sea as it prepares to dock in the eastern city of Port Sudan, Sudan March 1, 2021. REUTERS/El Tayeb Siddiq

Turkish Navy research vessel TCG Cesme sails in the Bosphorus in Istanbul, Turkey October 16, 2019. Picture taken October 16, 2019. REUTERS/Yoruk Isik

A Myanmar Navy vessel, which will be used to pick up deported Myanmar migrants from Malaysia, is docked at a jetty in Lumut, Malaysia February 22, 2021. REUTERS/Lim Huey Teng

Myanmar Navy vessels, which will be used to pick up deported Myanmar migrants from Malaysia, are docked at a jetty in Lumut, Malaysia February 22, 2021. REUTERS/Lim Huey Teng

Graphics shows the number of Chinese vessels expelled by the Taiwanese guard coast since 2017

A commercial vessel sails through Bosphorus during a two-day curfew amid the spread of the coronavirus disease (COVID-19), in Istanbul, Turkey, February 6, 2021. REUTERS/Umit Bektas

A sand-dredging ship is seen among other vessels during sunset from Nangan island, the main island of the Taiwan-controlled Matsu islands, January 28, 2021. Picture taken January 28, 2021. REUTERS/Ann Wang

Pessangers travel on a ferry as a commecial vessel sails past Bosphorus in Istanbul, Turkey, January 26, 2021. REUTERS/Umit Bektas

A migrant is disembarked from a Spanish coast guard vessel, in the port of Arguineguin, to the island of Gran Canaria, Spain January 23, 2021. REUTERS/Borja Suarez

A rescuer disembarks a minor migrant from a Spanish coast guard vessel, in the port of Arguineguin, to the island of Gran Canaria, Spain January 23, 2021. REUTERS/Borja Suarez

Migrants wait to disembark from a Spanish coast guard vessel, in the port of Arguineguin, in the south part of the island of Gran Canaria, Spain January 23, 2021. REUTERS/Borja Suarez

Migrant waits to disembark from a Spanish coast guard vessel, in the port of Arguineguin, in the south part of the island of Gran Canaria, Spain January 23, 2021. REUTERS/Borja Suarez

Migrant waits to disembark from a Spanish coast guard vessel, in the port of Arguineguin, in the south part of the island of Gran Canaria, Spain January 23, 2021. REUTERS/Borja Suarez

A migrant waits to disembark from a Spanish coast guard vessel, in the port of Arguineguin, in the south part of the island of Gran Canaria, Spain January 23, 2021. REUTERS/Borja Suarez

Rescuers disembark a migrant on a stretcher from a Spanish coast guard vessel, in the port of Arguineguin, to the island of Gran Canaria, Spain January 23, 2021. REUTERS/Borja Suarez

A commercial vessel sails past a small fishing boat through the Bosphorus, on its way to the Black Sea, during a two-day curfew amid the spread of the coronavirus disease (COVID-19), in Istanbul, Turkey, January 23, 2021. REUTERS/Umit Bektas

Migrants wait to disembark from a Spanish coast guard vessel, in the port of Arguineguin, in the south part of the island of Gran Canaria, Spain January 21, 2021. REUTERS/Borja Suarez

Migrants wait to disembark from a Spanish coast guard vessel, in the port of Arguineguin, in the south part of the island of Gran Canaria, Spain January 21, 2021. REUTERS/Borja Suarez

A migrant mother bottle feeds her baby as they wait to disembark from a Spanish coast guard vessel, in the port of Arguineguin, in the south part of the island of Gran Canaria, Spain January 21, 2021. REUTERS/Borja Suarez

A migrant waits to disembark from a Spanish coast guard vessel, in the port of Arguineguin, in the south part of the island of Gran Canaria, Spain January 21, 2021. REUTERS/Borja Suarez

Migrants wait to disembark from a Spanish coast guard vessel, in the port of Arguineguin, in the south part of the island of Gran Canaria, Spain January 21, 2021. REUTERS/Borja Suarez

A migrant waits to disembark from a Spanish coast guard vessel, in the port of Arguineguin, in the south part of the island of Gran Canaria, Spain January 21, 2021. REUTERS/Borja Suarez

Migrants wait to disembark from a Spanish coast guard vessel, in the port of Arguineguin, in the south part of the island of Gran Canaria, Spain January 21, 2021. REUTERS/Borja Suarez

Rescuers disembark the body of a deceased migrant from a Spanish coast guard vessel, in the port of Arguineguin, in the south part of the island of Gran Canaria, Spain January 21, 2021. REUTERS/Borja Suarez

Rescuers disembark the body of a deceased migrant from a Spanish coast guard vessel, in the port of Arguineguin, in the south part of the island of Gran Canaria, Spain January 21, 2021. REUTERS/Borja Suarez

Migrants wait to disembark from a Spanish coast guard vessel, in the port of Arguineguin, in the south part of the island of Gran Canaria, Spain January 21, 2021. REUTERS/Borja Suarez

A migrant baby is disembarked from a Spanish coast guard vessel, in the port of Arguineguin, to the island of Gran Canaria, Spain January 20, 2021. REUTERS/Borja Suarez

Migrants wait to disembark from a Spanish coast guard vessel, in the port of Arguineguin, to the island of Gran Canaria, Spain January 20, 2021. REUTERS/Borja Suarez

Migrants wait to disembark from a Spanish coast guard vessel, in the port of Arguineguin, to the south part of the island of Gran Canaria, Spain January 20, 2021. REUTERS/Borja Suarez

A migrant baby is disembarked from a Spanish coast guard vessel, in the port of Arguineguin, to the south part of the island of Gran Canaria, Spain January 20, 2021. REUTERS/Borja Suarez

Migrants wait to disembark from a Spanish coast guard vessel, in the port of Arguineguin, to the south part of the island of Gran Canaria, Spain January 20, 2021. REUTERS/Borja Suarez

Migrants wait to disembark from a Spanish coast guard vessel, in the port of Arguineguin, to the south part of the island of Gran Canaria, Spain January 20, 2021. REUTERS/Borja Suarez

A man on a paddleboard watches a group of migrants waiting to disembark from a Spanish coast guard vessel, in the port of Arguineguin, to the south part of the island of Gran Canaria, Spain January 20, 2021. REUTERS/Borja Suarez

Migrants wait to disembark from a Spanish coast guard vessel, in the port of Arguineguin, to the south part of the island of Gran Canaria, Spain January 20, 2021. REUTERS/Borja Suarez

Migrants wait to disembark from a Spanish coast guard vessel, in the port of Arguineguin, to the south part of the island of Gran Canaria, Spain January 20, 2021. REUTERS/Borja Suarez

A migrant baby is disembarked from a Spanish coast guard vessel, in the port of Arguineguin, to the south part of the island of Gran Canaria, Spain January 20, 2021. REUTERS/Borja Suarez

A migrant is helped to disembark from a Spanish coast guard vessel, in the port of Arguineguin, in the south part of the island of Gran Canaria, Spain January 15, 2021. REUTERS/Borja Suarez

A migrant disembarks from a Spanish coast guard vessel, in the port of Arguineguin, in the south part of the island of Gran Canaria, Spain January 15, 2021. REUTERS/Borja Suarez

Rescuers disembark a migrant on a stretcher from a Spanish coast guard vessel, in the port of Arguineguin, in the south part of the island of Gran Canaria, Spain January 15, 2021. REUTERS/Borja Suarez

Two rescuers disembark a minor migrant from a Spanish coast guard vessel, in the port of Arguineguin, in the south part of the island of Gran Canaria, Spain January 15, 2021. REUTERS/Borja Suarez

A migrant waits to disembark from a Spanish coast guard vessel, in the port of Arguineguin, in the south part of the island of Gran Canaria, Spain January 15, 2021. REUTERS/Borja Suarez

Migrants wait to disembark from a Spanish coast guard vessel, in the port of Arguineguin, in the south part of the island of Gran Canaria, Spain January 4, 2021. REUTERS/Borja Suarez

A migrant rescued in the Atlantic Ocean sits on the ground after disembarking from a Spanish coast guard vessel, in the port of Arguineguin, to the south part of the island of Gran Canaria, Spain January 4, 2021. REUTERS/Borja Suarez

Migrants rescued in the Atlantic Ocean sit on the ground after disembarking from a Spanish coast guard vessel, in the port of Arguineguin, in the south part of the island of Gran Canaria, Spain January 4, 2021. REUTERS/Borja Suarez

Bangladesh Navy personnel help a disabled Rohingya refugee child to get off from a navy vessel as they arrive at the Bhasan Char island in Noakhali district, Bangladesh, December 29, 2020. REUTERS/Mohammad Ponir Hossain

Rohingya refugees sit on wooden benches of a navy vessel on their way to the Bhasan Char island in Noakhali district, Bangladesh, December 29, 2020. REUTERS/Mohammad Ponir Hossain

A Rohingya refugee child sleeps on a wooden bench of a navy vessel on their way to the Bhasan Char island in Noakhali district, Bangladesh, December 29, 2020. REUTERS/Mohammad Ponir Hossain

Meal is served to the Rohingya refugees on a navy vessel on their way to the Bhasan Char island in Noakhali district, Bangladesh, December 29, 2020. REUTERS/Mohammad Ponir Hossain

Rohingya refugees wait to get off from a navy vessel as they arrive at the Bhasan Char island in Noakhali district, Bangladesh, December 29, 2020. REUTERS/Mohammad Ponir Hossain

Rohingya refugees wait to get off from a navy vessel as they arrive at the Bhasan Char island in Noakhali district, Bangladesh, December 29, 2020. REUTERS/Mohammad Ponir Hossain

Freezer trawlers 'Halten-bank' and 'Cap Nord' are seen behind the customs patrol vessel 'Jacques Oudart Fourmantin' docked at Boulogne-sur-Mer after Britain and the European Union brokered a last-minute post-Brexit trade deal, northern France, December 28, 2020. Picture taken December 28, 2020. REUTERS/Charles Platiau