Platform Wreck 9558

Surveying Details

H4407/77 17.11.78 H4407/77 17.11.78 FOUL AREA 1000MTRS RADIUS, CENTRED ON 555257N, 052236W. 3 CONCRETE ANCHORS & ASSOCIATED CABLES ALSO EXIST. NORTH ANCHOR IN 555327.5N, 052248.4W [OGB]. HEIGHT 3MTRS ABOVE SEABED, WITH SEABED FEATURE OF GREATER HEIGHT NEARBY. ANCHOR DIMENSIONS 14.85 X 14.85 X 5.5MTRS, WEIGHT IN AIR 213TONS, IN WATER 126 TONS. CHAIN CABLES 800MTRS & 350MTRS ATTACHED. WEST ANCHOR IN 555236.8N, 052324.6W [OGB]. HEIGHT 3.2MTRS ABOVE SEABED. DIMENSIONS 11.65 X 11.65 X 4.3MTRS. WEIGHT IN AIR 154TONS, IN WATER 91 TONS. CHAIN CABLE 510MTRS ATTACHED. EAST ANCHOR IN 555253.9N, 052138.1W [OGB]. HEIGHT 4.8MTRS ABOVE SEABED. DIMENSIONS 14 X 14 X 7.3MTRS, WEIGHT IN AIR 120 TONS, IN WATER 72 TONS. CHAIN CABLE 800MTRS ATTACHED. A SOUTHERN ANCHOR (POSN NOT SUPPLIED), DIMENSIONS 8.37 X 8.37 X 3.1MTRS, WEIGHT IN AIR 68 TONS, IN WATER 41TONS, WITH 675MTRS OF CHAIN CABLE ATTACHED, IS COMPLETELY BURIED UNDER SEABED. (SESAM SURVEY, JAN 1977). INS AS FOUL AREA, RADIUS 1000MTRS, WITH LEGEND: DISUSED PLATFORM CONSTRUCTION AREA AND INS OBSTNS IN: 555327.5N, 052248.4W; 555236.8N, 052324.6W AND 555253.9N, 052138.1W. NE 2381. H4238/75 1.3.79 H4238/75 1.3.79 INS OBS WITHIN PECKED AREA ON 2381. - NM 424/79. H4407/77 15.7.83 H4407/77 15.7.83 THERE ARE NO PLANS TO REMOVE ANY OF THESE ANCHORS, & ASSOCIATED CABLES, WHEN THE PORTAVADIE RIG CONSTRUCTION SITE IS REDEVELOPED IN THE NEAR FUTURE. (CB). 24.10.02 24.10.02 SEPARATE RECORDS CREATED FOR ANCHORS AND CHAINS. SEE 58905, 58906, 58907.