Simushir and tugboat Barbara Foss expected in Prince Rupert Sunday night

A large American tug boat is pulling a disabled Russian cargo ship to a port in Prince Rupert on British Columbia's north coast, ending fears that the vessel, which lost power Thursday night, would drift ashore, hit rocks and spill hundreds of tons of fuel.

Russian cargo ship that lost power late Thursday night

U.S. tug Barbara Foss spent Sunday towing the Simushir to Prince Rupert 2:10

A large American tug boat is pulling a disabled Russian cargo ship to a port on British Columbia's north coast, ending fears that the vessel, which lost power Thursday night, would drift ashore, hit rocks and spill hundreds of tons of fuel.

The Canadian Forces' Joint Rescue Co-ordination Centre in Victoria said the tug Barbara Foss arrived Saturday evening at around 5:30 p.m. PT and secured a line to the Russian ship. Officials said Sunday morning the tow was going well.

At this point, the ship is riding well behind the tug, and the weather and sea conditions are not posing concerns. We expect a steady and uneventful voyage to Prince Rupert.- Gary Faber, senior vice-president of Foss Maritime

"The American ocean-going tug... reached the stricken vessel, successfully took Simushir under tow and began heading in a northwesterly direction, keeping a safe distance from the west coastline of Haida Gwaii," a statement from the Canadian Forces' Joint Task Force Pacific (JTFP) read.

As of noon Sunday, the vessels were at the northwest end of Haida Gwaii and began heading east into the Dixon Entrance, JTFP said.

Acting Sub.-Lt. Melissa Kia, speaking for the Joint Rescue Co-ordination Centre, said the winds and seas have calmed significantly since Saturday.

Kia said the owners of the Russian vessel asked to have it taken to Prince Rupert, the nearest container ship port, which is 93 nautical miles, or 171 kilometres, away from where the tow operation began.

As of noon, the Barbara Foss and the Simushir were approximately 86 nautical miles from Prince Rupert and travelling at six knots.

Gary Faber, senior vice-president of Seattle-based Foss Maritime, said the Barbara Foss is expected to arrive in port, with the Simushir in tow, at approximately 10 p.m. PT Sunday night.

As of noon Sunday, the Barbara Foss and the Simushir were at the northwest end of Haida Gwaii. The pair then began heading east into the Dixon Entrance. (Maritime Forces Pacific/Facebook)

"At this point, the ship is riding well behind the tug, and the weather and sea conditions are not posing concerns. We expect a steady and uneventful voyage to Prince Rupert."

The Prince Rupert Port Authority tweeted an update a few hours later, estimating that the Simushir would reach Triple Island at roughly 1 a.m. PT Monday, where it would be boarded by a harbour pilot and brought to a terminal.

The Canadian Coast Guard vessel Sir WilfridLaurier, the U.S. Coast Guard cutter Spar and the Canadian Coast Guard ship Gordon Reid have been stood down and are returning to regular duties, JTFP officials said.

The RCAF Cormorant helicopter, RCAF Buffalo aircraft and the U.S. Coast Guard Jayhawk helicopter that were on standby at Sandspit airport have also returned to regular duties.

The Simushir, shown here being towed by the Barbara Foss, is expected in port in Prince Rupert either late Sunday night or early Monday morning. (Maritime Forces Pacific/Facebook)

Power lost Thursday night

The Simushir lost power due to a mechanical failure late Thursday off Haida Gwaii, also known as the Queen Charlotte Islands, as it made its way from Everett in Washington state to Russia.

A video still shows the Canadian Coast Guard ship Gordon Reid on Saturday, Oct. 18, 2014. (Council of the Haida Nation/YouTube)

The Gordon Reid arrived on scene Friday night and started towing the disabled ship away from shore, but three attempts to keep a towline attached failed and the ship was adrift again for six hours Saturday daytime.

The 10 crew members aboard the Simushir were trying to repair the broken oil heater that has left the vessel disabled, Royal Canadian Navy Lt. Greg Menzies said.

'We might have averted catastrophe'

The president of the Council of the Haida Nation warned Friday that a storm coming into the area was expected to push the ship onto the rocky shore, but President Pete Lantin later said their worst fears had subsided.

"If the weather picks up it could compromise that, but as of right now there is a little sense of relief that we might have averted catastrophe here," Lantin said.

About 5,000 people live on the islands and fish for food nearby, Lantin said.

The fear of oil spills is especially acute in British Columbia, where residents remember the Exxon Valdez tanker ship disaster that struck Alaska's coastline in 1989. Such worries have fed fierce opposition — particularly from environmentalists and coastal First Nations — to a proposal to build a pipeline that would carry oil from Canada's Alberta oil sands to a terminal in Kitimat, British Columbia, for shipment to Asia.

Opponents say the proposed pipeline would bring about 220 large oil tankers a year to the province's coast.

The Simushir, which is about 135 metre long, was carrying a range of hydrocarbons, mining materials and other related chemicals. That included 400 tons of bunker oil and 50 tons of diesel. The vessel is not a tanker but rather a cargo ship. In comparison, the tanker Exxon Valdez, spilled 35,000 metric tons of oil.

A spokesman for Russian shipping firm SASCO, the owners of the vessel, said it is carrying 298 containers of mining equipment in addition to heavy bunker fuel as well as diesel oil for the voyage.

Officials said the injured captain was evacuated by helicopter Friday afternoon, but they were given no further medical details.

The Simushir is registered in Kholmsk, Russia, and owned by SASCO, also known as Sakhalin Shipping Company, according to the company's website. The SASCO website says the ship was built in the Netherlands in 1998.

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      With files from the CBC's Richard Zussman and The Associated Press