Coast Guard Spokesman David Mosley in Anchorage says the tug Aiviq began experiencing engine problems late last night. He says it has enough power to maintain its current position, about 48 hours from landfall.
Shell’s Noble Discoverer drill rig has had several high-profile mishaps in 2012. Now, the Coast Guard says it found problems with the rig's on-board systems during an emergency inspection in Seward.
In September, a key test of underwater oil-spill equipment was a spectacular failure.
Shell has paused its drilling operation in the Arctic just a day after starting.
Royal Dutch Shell has begun drilling in the Chukchi Sea off Alaska's northwest coast.
Interior Secretary Ken Salazar is planning a three-day trip to Alaska. Salazar is preparing to decide whether to issue final drilling permits to Shell Oil, which hopes to drill exploratory wells this summer in the Chukchi and Beaufort seas.
The Coast Guard is relaxing certification standards for Shell’s oil spill containment barge. The company convinced regulators the Arctic Challenger should be considered a mobile unit. Among other things, that means its mooring system only needs to be able to weather a 10-year storm, as opposed to the more rigorous 100-year standard for fixed platforms.
A few more than a dozen activists gathered at the national headquarters of the Environmental Protection Agency protesting Shell's request for a waiver from the Clean Air Act.
Shell Oil has run into a number of problems with its Arctic drilling plans over the last week.
Shell Oil is seeking to changes to the air permit for one of its drill ships after a spokesman says generator engines tested slightly above permit levels for ammonia and nitrous oxide.