How would you like the money? <a href=" http://www.leevalleylions.co.uk/nexium-uso-continuo.pdf ">dangers of taking nexium long term</a> The Teknik Perdana, a 285-foot survey vessel, is flagged in Panama and owned by TL Geohydrographics Ltd. of Singapore. The ship was operating in what is known as the Roraima concession block, an area of the Atlantic off Guyana and Venezuela that that has drawn increased exploration interest in recent years.