Crew change lessons have been learned at a cost, but opinions are divided on how hard the hit has been from subsequent lockdowns caused by new strains of the Covid-19 virus.

Most of the world's ports have been a challenge for seafarer rotations at some point over the last year, ship managers told TradeWinds.

Wallem Shipmanagement managing director and interim chief executive John-Kaare Aune pointed to big problems early on when India would not even let its own nationals return or travel out as it went into lockdown.