A crewman has tested positive for coronavirus on a boxship owned by Greenland's Royal Arctic Line (RAL).
The company said it was told on Sunday that Covid-19 had been confirmed on a vessel in Denmark.
Maritime Denmark reported the ship as the 2,148-teu Tukumu Arctica (built 2020), but this has not been confirmed.
It is understood the crew had recently been shifted off the ship.
The vessel has been in Aalborg since arriving from China at the end of February.
The company launched an emergency response across the fleet following the notification, RAL said.
Risk is a part of everyday life
"Royal Arctic Line ships sail between Denmark and Greenland and with seamen on board who come everywhere from where there is general social contagion," it said.
"Our sailors therefore live with a risk of infection and this is part of the everyday life they go through to maintain Greenland's supply."
It added: "Royal Arctic Line's vessels are therefore in a constant Covid-19 contingency which means that the crews are paying particular attention to symptoms. In addition, there are restrictions on the ships with regard to dealing with people at the ports when the ships are in Greenland."
Cases of Covid-19 are now being reported more frequently on merchant vessels, with crew on a Maersk boxship, a Greek ferry, a UK FPSO and a Nigerian OSV among those hit.
