Simplified Wreck Survey
Dive wreck surveying details for the underwater obstruction named Second Chance possibly located at coordinates 51 50.359 N, 1 33.35 E. Historical hydrographic surveys spanning from 1977 to 2013 document the evolution of the site from initial reports of a sinking to multiple detailed marine surveys using modern technology including DGPS and multibeam sonar. Structural descriptions note pieces of steel and iron debris, scour holes, and dimensions measuring approximately 26.4 meters in length, 3.3 meters in width, and a height of 1.5 meters, lying on a 030/210 degree orientation. The wreck is largely broken up with a least depth measuring approximately 16.6 meters.
Surveying Details
25.10.77 SANK IN 515000N, 013100E, APPROX. (CG THAMES). NCA. H1955/80 25.3.82 LOCATED 12.10.81 IN 515020N, 013330E [OGB] USING HIFIX/6 [2 LOP]. LEAST E/S DEPTH 16.9 IN GEN DEPTH 17.5MTRS. NO SCOUR. APPARENTLY UNDER 10MTRS LONG AND COULD BE A ROCK. (HMS ENTERPRISE, HI 25). INS AS FOUL. BR STD. H2913/83 17.10.84 LOCATED 27.6.84. NOT FULLY SURVEYED. SMALL BUT CONSPICUOUS CONTACT WITH SCOUR. (HMS ECHO, HI 192). H4024/86 12.2.88 TWO SMALL LINEAR CONTACTS EXAM'D 2.9.87 IN 515020N, 013327E [OGB]. THEY LIE IN LINE ABOUT 25MTRS APART, ORIENTATED 015/195 DEGS. NO MAGNETIC ANOMALY DETECTED. COULD WELL BE SMALL ROCK OUTCROPS. (NP 1016, HI 373). NCA. HH090/494/01 22.8.90 EXAM'D 14.6.90 IN 515020N, 013316E [OGB] USING TRISPONDER [7 LOP]. LEAST E/S DEPTH 16.6 IN GEN DEPTH 17MTRS. NO SCOUR. NO DISTINCT DCS3 SHADOW OBTAINED. APPEARS TO BE COVERED WITH RIPPLED SAND WITH TWO CONTACTS PROJECTING THROUGH. SIZEABLE MAGNETIC ANOMALY OBSERVED. CHART AS FOUL 16.6MTRS. (NP 1016, HI 494). BR STD. HH090/573/01 30.9.93 LOCATED 8.8.93 IN 515019.7N, 013327.5E [OGB] USING TRISPONDER [3 LOPS]. LEAST E/S DEPTH 16.5 IN GEN DEPTH 17.2MTRS. SCOUR DEPTH 17.3MTRS. NO DCS3 HT. NO MAGNETIC ANOMALY (CONSIDER 1990 REPORT IN ERROR). TYPICAL E/S TRACE FOR SMALL WK. (NP 1016, HI 573). NFS. AMEND TO WK 16.5MTRS. BR STD. HH090/690/01 20.5.96 EXAM'D 26.4.96 IN 515020.0N, 013327.4E [OGB] USING DGPS. LEAST E/S DEPTH 16.4 IN GEN DEPTH 16.7MTRS. POSSIBLE SCOUR 0.5MTR DEEP. NO DCS3 HT. LENGTH 50MTRS, WIDTH 5MTRS. LIES 030/210 DEGS. NO MAGNETIC ANOMALY. APPEARS TO BE IN TWO PARTS, ONE LARGE AND ONE SMALL. (NP 1016, HI 690). BR STD. HH090/851/01 6.7.99 LOCATED, NOT EXAMINED. (NP 1016, HI 851). NCA. 17.6.09 DIVED IN LISTED POSN. DIVERS REPORT TWO SCOUR HOLES, EACH WITH A PIECE OF STEEL/IRON IN IT. THEIR FORM/STRUCTURE DID NOT GIVE ANY IDEA OF WHAT THEY COULD BE. LESS LIKELY THAT THIS IS A CABIN CRUISER WRECK. (G RAYNER, EMAIL DTD 17.6.09). NCA. SEP 2012/000129754 17.7.12 LOCATED 23.3.12 IN 5150.33660N, 0133.33098E [WGD]. LENGTH 15.5MTRS, WIDTH 1.8MTRS, HT 0.3MTR. WRECK, LARGELY BROKEN UP. (EMU, FOR HANSON AGGREGATES, REPORT DTD 22.6.12). NCA. 28.2.13 EXAM'D 24.11.12 IN 5150.359N, 0131.350E [WGD]. LEAST M/B DEPTH 16.64 IN GEN DEPTH 16MTRS (SIC). NO SCOUR. LENGTH 26.4MTRS, WIDTH 3.3MTRS, HT 1.5MTRS. LIES 030/210 DEGS. SLIGHT MAGNETIC ANOMALY. (NETSURVEY, HI 1398). TWO AREAS OF SCOUR WITH DEBRIS. SURVEYED DIMENSIONS REFER TO DISTANCE BETWEEN SCOURS. AMEND WK 16.6MTRS IN REVISED POSN.
General Comments
TWO SCOUR HOLES WITH DEBRIS IN EACH