Notice: Oil Drilling Rig North of Tobago The Diamond Offshore Ocean Lexington drilling rig was towed from Chaguaramas, Trinidad and installed on the Block 22 Cassra NW well site north of Tobago at 11.29,32N. 60.46,50W in mid-June, and is expected to be at the site through early August. During drilling operations, marine users should observe the Safety Zone of 500 metres around the rig. For more information contact the Centrica Energy Community Relations Officer on (868) 714-1280.