Guardian: The protest group Greenpeace claims it could occupy a deepwater drilling ship off Shetland for up to a month after two activists attached a “survival pod” to the vessel’s anchor. In the latest stage of its campaign against deep sea drilling, Greenpeace has targeted a 228m long ship owned by the US oil giant Chevron which had been preparing to set sail to drill in about 500m of water some 150km north of Shetland. The campaigners, based on the Greenpeace protest ship Esperanza, …