View of the Sensory equipment of the ROV (ROUV, Remotely operated underwater vehicle after its mission on a methane leak at the seabed of the North Sea. Activists on board the Greenpeace ship Esperanza documented two large methane leaks located in the British exclusive economic zone (at positions 57°55.30'N, 001°37.87'E and 57°54.81'N, 001°38.72'E) in the North Sea. Caused by a major blow-out incident during a gas drilling operation 30 years ago, the leak is still emitting the highly potent greenhouse gas methane.