The IMO has called facilitating crew changes and getting seafarers home "two of the biggest challenges facing the shipping industry" from Covid-19.

The UN-backed regulator said Thursday that the 12-step plan to get seafarers to and from ships provides a path to solving the issue, affecting hundreds of thousands worldwide.

"At their heart is a call that, provided shipping companies broadly comply with and adhere to measures applicable to them, governments and their relevant national authorities should, for their part, do everything possible to allow crew changes to happen," the IMO said.