Seafarers were not the only ones to suffer during the crew-change crisis — onshore crewing staff also worked long hours with constant stress, frustration and pressure.

“One of the biggest fallacies of this pandemic is to think that there are only stresses and strains on board," Columbia Shipmanagement chief executive Mark O'Neil said.

"It is so frustrating and mentally draining to go through all the arrangements for a crew change and then have them fall down at the last hurdle and have aggravated crew screaming down the phone that you are not doing enough.”