The Noble Discoverer slipped its mooring in Unalaska Bay , Shell says . It drifted towards shore near Unalaska Bay , a petty officer says . Shell Oil says it is investigating the incident . The Noble Discoverer is One of the ships Shell Oil plans to use to drill in the Dutch Harbor .
The Noble Discoverer slipped its mooring in Unalaska Bay , the Coast Guard says . It drifted towards shore near Dutch Harbor , a petty officer says . Shell Oil says it is investigating the incident . The Noble Discoverer is one of the ships Shell plans to use to drill in the Arctic .