This morning we've heard from Ben on board our ship Esperanza that they are currently anchored about 2km from the deepwater drilling rig Stena Don in the Davis Straits between Canada and Greenland. The crew left London 12 days ago to confront dangerous deepwater drilling in the Arctic and today they've been met by a Danish warship and warned that the ship will be raided and the captain arrested if the ship breaches the 500m security zone surrounding each of the rigs.

But it's a UK company that has come to one of the most remote and harsh environments on the planet in pursuit of the last drops of oil. Cairn Energy is currently drilling two wells off the west coast of Greenland and has plans for two more wells in the area before the end of the summer. And now they are being protected by the Danish equivalent of the navy Seals. The crew on the ship have told us they've seen three navy inflatable boats in the waters around the rig.

It's not the oil rigs that need protecting. We all saw the risks of deepwater drilling with BP's Deepwater Horizon disaster in the Gulf of Mexico. The risks in the colder waters of the Arctic are of a different magnitude. The freezing waters mean that any oil spilt takes much longer to break down. Also, the annual freezing of the sea means any 'relief well' would take up to three years to drill, leaving the oil gushing out for all that time.

Then there's the icebergs. Cairn is employing small ships to drag icebergs out of the way of their rigs, but that only works for small icebergs. When they get big, you've got to move the rigs - fast. Deepwater drilling in the Arctic is a disaster waiting to happen.

The Arctic is a barometer of the health of the planet. It's home to some of the world's most distinctive mammals like polar bears, walruses, caribou, narwhals and beluga whales. It supports millions of migratory and resident birds. The Arctic also plays a major role in the regulation of the global climate by acting like a giant reflective shield limiting the amount of sun and heat absorbed by the Earth.

But this is bigger than the Arctic. The oil industry's relentless hunt for oil has much larger consequences. If we burn every last barrel of oil we're set for a six degree rise in global average temperatures.  This would have cataclysmic and irreversible consequences for our planet threatening oceans, forests, wildlife and the basis of human civilization.

As a society we're dependent oil. We know it's going to take time to make the transition away to a fully clean energy future and that there will be hurdles along the way. But one thing is for certain: companies like Cairn Energy who chase the last drops of oil at any environmental cost are pushing us in the wrong direction. It's time to go beyond oil.

Because the ship has now moved within the Arctic Circle, internet access is patchy. But we'll keep you up to date as we hear from Lisa and the rest of the crew.

In the meantime we need you to contact Cairn Energy as well and tell CEO Bill Gammell to stop drilling in the Arctic.