Port states must give ships' crew freedom of movement and treat them as "key workers" in line with healthcare staff in the battle to combat the Covid-19 pandemic, according to Anglo-Eastern Univan chief executive Bjorn Hojgaard.

If governments worldwide fail to do so, Hojgaard added that food, medicine and medical supply chains will feel the effect.

He said crew are under increasing pressure and will soon be dangerously fatigued if lockdown and quarantine...