Hospital ship charity Mercy Ships has raised more than $750,000 so far from its Cargo Day this year, with a couple of weeks still to go.

More than 80 companies from the global shipping and trading community have participated in this year's fundraiser, and further Mercy Cargoes will be accepted until December 31.

"Donations and so-called Mercy Cargoes, where charterers allocate cargoes and brokers contribute 50% of their commission, are still very welcome," Mercy Ships said.