Bad weather conditions have postponed efforts to salvage a Dutch cargo ship that has been drifting off the coast of Norway for two days after its crew was evacuated, Norwegian maritime officials said.

Norwegian and Dutch salvage experts are now expected to try again on Thursday.

“Life and health are always the first priority during an incident like this, and it must be safe to carry out the rescue,” said Hans Petter Mortensholm, emergency director at the Norwegian Coastal Administration.

The weather in the region has improved slightly and the ship was no longer in immediate danger of capsizing, even though it was listing at a 40-50 degree angle, Norwegian officials said.

However, it is slowly being carried landward by the waves, and there is a risk that it could run aground later on Wednesday.

The vessel has substantial quantities of diesel and fuel in its tanks, which could cause an environmental disaster if released into the sea.

The Eemslift Hendrika, a Netherlands-registered special ship designed to carry boats on its deck, is adrift in an area where the North Sea and Norwegian Sea meet, some 25-31 miles off the shore and the city of Alesund.

The crew of 12 was evacuated to shore by helicopter after the ship sent a distress call following a power outage in its main engine in heavy seas late on Monday.

Norwegian news agency NTB said that under a salvage plan four Dutch rescue experts would be lowered onto the Eemslift Hendrika by helicopter, after which they would attach towing ropes to secure the vessel to two waiting tug boats.

One large boat aboard the deck of the six-year-old Eemslift Hendrika fell off the vessel in heavy seas on Tuesday, helping to stabilise the ship.