Surveying Details
H1654/38 21.3.38 LOCATED, LYING ON SIDE WITH LEAST DEPTH 33 IN 43FT IN POSN CAISTER WATER TWR 238.5DEGS, 1.94M. (TH DTD 3.3.38). CHART AS WK 3FMS 3FT. - NM 591/38. H7759/38 AMEND TO WK 5FMS 3FT. (SURVEY [E5416]). H7759/38 25.10.60 AREA 840FT RADIUS AROUND CHARTED POSN SWEPT BY TWO MLS ON 13,14,15.7.54. CLEAR AT 7FMS. SOUNDINGS OF 45FT AND 44FT OBTAINED 420 & 700FT, RESPECTIVELY, N OF 524027N, 014540E. (HMS SCOTT, DTD 19.4.55). H1333/60 13.2.61 NOT FOUND USING E/S OR SONAR. (ECES, DTD 1959). H3883/63 12.11.63 LEAST DEPTH OBTAINED 56FT. NOT FULLY EXAM'D. (ISS, DTD 1963). H3883/63 AMENDED TO WK 9FMS 2FT. (ISS, DTD 1963). BR STD. H1927/69 10.1.69 EXAM'D 6.9.68 IN 524023N, 014548E USING HSA. SWEPT CLEAR AT 48, FOUL AT 49FT. LEAST E/S DEPTH 53 IN GEN DEPTH 65FT. SCOUR DEPTH 68FT. (HMS EGERIA, DTD 26.9.68). AMENDED TO SW 8FMS. - NM 76/71. H1927/69 16.12.70 LOCATED IN 524032N, 014550E USING HIFIX/3 [2 LOP]. LEAST E/S DEPTH 16.3 IN GEN DEPTH 20MTRS. SCOUR DEPTH 22MTRS. (HMS ECHO, HI 7A/70). NCA YET. H1927/69 21.5.73 LOCATED IN 524050N, 014555E [OGB] USING HFIX/3 [2 LOP]. LEAST E/S DEPTH 15.9 IN GEN DEPTH 20MTRS. SCOUR DEPTH 20.6MTRS. (HMS ECHO, H525). POSN CONSIDERED TO BE IN ERROR. H1927/69 21.5.73 AMENDED TO SW 14.6MTRS. NC 1536 & NC 1543. H4852/74 17.12.74 EXAM'D IN 524032N, 014549E [OGB] USING HIFIX.3 [2 LOP]. LEAST E/S DEPTH 15.5 IN GEN DEPTH 20MTRS. SCOUR DEPTH 20.8MTRS. OF SMALL EXTENT AND APPARENTLY LYING NW/SE ON VERY UNEVEN SEABED. (HMS ECHO, HI 11/74). NCA. H4852/74 26.1.79 EXAM'D 22.8.78 IN 524032N, 014550E [OGB] USING HIFIX/6 [2 LOP]. LEAST E/S DEPTH 16.8 IN GEN DEPTH 18-20MTRS. SCOUR 21MTRS. DCS3 HT 3.5MTRS. SWEPT CLEAR AT 16, FOUL AT 16.5MTRS. LIES NNW/SSE. (HMS ECHO, HI 64B/78). AMENDED TO SW 16MTRS. BR STD. H1960/79 30.3.81 EXAM'D 13.10.81 IN 524032N,014550E [OGB] USING HIFIX/6 [2 LOP]. LEAST E/S DEPTH 15.5 IN GEN DEPTH 19.9MTRS. SCOUR 20.9MTRS. E/S DEPTH POSSIBLY WEED. (HMS EGERIA, HI 62B/80). NCA. H2908/83 18.12.84 EXAM'D 10.10.84 IN 524032N, 014549E [OGB] USING HIFIX/6 [2 LOP]. SWEPT CLEAR 16.6, FOUL 16.7MTRS. LEAST E/S DEPTH 15.6 IN GEN DEPTH 20MTRS. SCOUR DEPTH 21MTRS. DCS3 HT 3.5MTRS. GOOD SONAR CONTACT, LYING NW/SE. E/S LEAST DEPTH THOUGHT PROBABLY CAUSED BY 'SAND PLUME' DUE TO STRONG TIDAL STREAM. (HMS ENTERPRISE, HI 188). AMENDED TO SW 16.6MTRS. BR STD. H4021/86 6.8.87 EXAM'D 25.5.87 IN 524032N, 014550E [OGB] USING TRISPONDER [4 LOP]. LEAST E/S DEPTH 15.4 IN GEN DEPTH 21MTRS. SCOUR DEPTH 22MTRS. DCS3 HT 5.5MTRS, LENGTH 45MTRS, WIDTH 7MTRS. LYING 155/335DEGS, WITH BOW PROBABLY NW. LEAST DEPTH OBTAINED MAY BE FROM SAND PLUME AGAIN. RETAIN SWEPT DEPTH. MAGNETOMETER INDICATES IRON CONTENT OF 150-350 TONNES. (NP 1016, HI 370). NCA. HH090/487/01 27.6.90 EXAM'D 24.4.90 IN 524031.9N, 014549.4E [OGD] USING TRISPONDER. SWEPT CLEAR AT 16.2, FOUL AT 16.5MTRS. LEAST E/S DEPTH 15.9 IN GEN DEPTH 19.5MTRS. SCOUR DEPTH 22MTRS. DCS3 HT 3.8MTRS, LENGTH 20MTRS, BEAM 8MTRS. REASONABLY INTACT, LYING 160/340DEGS, IN AREA OF SAND RIPPLES. MAGNETOMETER DEFLECTION OBSERVED NEAR WK. (NP 1016, HI 487). AMEND TO WK 15.9MTRS. BR STD. HH090/487/01 29.8.90 DIFFERENCE BETWEEN SWEPT AND E/S DEPTH CONSIDERED DUE TO WEED ATTACHED TO WK. SWEPT DEPTH SHOULD BE ACCEPTED. (NP 1016, 7.8.90). AMENDED TO SW 16.2MTRS. BR STD. HH090/569/01 13.7.93 LOCATED 3.5.93 IN CHARTED POSN. LEAST E/S DEPTH OBTAINED 16.4 IN GEN DEPTH 20MTRS. NO SCOUR. STRONG MAGNETIC ANOMALY. NOT EXAM'D. RETAIN AS CHARTED. (NP 1016, HI 569). HH090/686/01 22.3.96 LOCATED, NOT EXAMINED. (NP 1016, HI 686). NCA.POSITIONS BELOW THIS POINT ARE IN DEGREES, MINUTES AND DECIMALS OF A MINUTE HH090/844/01 13.4.99 EXAM'D 12.3.99 IN 5240.560N, 0145.712E [WGD] USING DGPS. LEAST E/S DEPTH 16.5 IN GEN DEPTH 20MTRS. NO SCOUR. DCS3 HT 2MTRS. LENGTH 40MTRS, WIDTH 10MTRS. LIES 170/350DEGS. MODERATE MAGNETIC ANOMALY. IN ONE PIECE. (NP 1016, HI 844). AMEND TO WK 16.5MTRS IN REVISED POSN. BR STD. HH242/540/19 15.6.05 LEAST M/B DEPTH 16.4MTRS IN 5240.569N, 0145.707E [WGD]. (NP 1016, HN DTD 6.6.05). BR STD. HH091/110/01 16.8.05 EXAM'D 26.4.05. LEAST M/B DEPTH 16.39 IN GEN DEPTH 18MTRS. SCOUR 1.5MTRS DEEP EXTENDS 56MTRS TOWARDS 350 DEGS. LENGTH 45MTRS, WIDTH 11MTRS, HT 2.2MTRS. LIES 160/340 DEGS. MODERATE MAGNETIC ANOMALY. APPEARS TO BE IN TWO PARTS BETWEEN TWO SANDWAVES. LARGER PART SOME 4MTRS TO THE S. SMALL PART IS IN A DEEP SCOUR WITH THE MAIN SCOUR EXTENDING FROM IT. (NP 1016, HI 1110). AMEND WK 16.3MTRS. BR STD. SEP 2018/000049120 6.3.18 EXAM'D 23.9.17 IN POSN 5240.52N, 0145.74E. LEAST M/B DEPTH 15.302 IN GEN DEPTH 17MTRES. (TRINITY HOUSE ROS). NFS. AMEND TO DW 15.3MTRS IN REVISED POSN. SEP 2017/000186964 25.4.18 NOT OBSERVED IN M/B SURVEY 2017. [EGS, HI 1545]. HOWEVER, RETAIN DEPTH 15.3MTRS AS ABOVE [TRINITY HOUSE ROS, DTD 23.9.17]. SEP 2018/000262689 17.1.19 NOT OBSERVED IN M/B SURVEY 2018. [A-2-SEA SOLUTIONS LTD, HI 1608]. HOWEVER, RETAIN DEPTH 15.3MTRS AS ABOVE [TRINITY HOUSE ROS, DTD 23.9.17]. SEP 2019/000294424 9.12.19 NOT OBSERVED IN M/B SURVEY 2019. [A-2-SEA SOLUTIONS LTD, HI 1636]. HOWEVER, RETAIN DEPTH 15.3MTRS AS ABOVE [TRINITY HOUSE ROS, DTD 23.9.17]. SEP 2020/000070899 1.1.20 EXAM'D BY BDC, NOT OBSERVED IN M/B SURVEY 2020. NFS.(TRINTIY HOUSE SURVEY & ROS 1.1.20). HOWEVER, RETAIN DEPTH 15.3MTRS AS ABOVE SEP 2021/000345703 11.1.22 NOT LOCATED IN M/B DATASET (2021). MOBILE SEABED. POSSIBLY COVERED BY SANDWAVES. (A-2-SEA SOLUTIONS LTD, HI1736). NFA. SEP 2022/000277109 09.09.22 NOT LOCATED IN M/B DATASET (2022). MOBILE SEABED. POSSIBLY COVERED BY SANDWAVES. (A-2-SEA SOLUTIONS LTD, HI1760). AMENDED DEAD, DELETED FROM CHART. RSDRA2024000011033 15.1.24 NOT LOCATED IN M/B DATASET (2023). (CLINTON MARINE SURVEY, HI1823). NFA. RSDRA2024000276816 01.11.24 NOT LOCATED IN M/B DATASET 2024. (TRINITY HOUSE SURVEY, DTD 28.07.2024).NFA. RSDRA2024000343133 16.02.25 NOT LOCATED IN M/B DATASET 2024. (CLINTON MARINE SURVEY, DTD 07.09.2024). NFA. RSDRA2025000327764 4.4.25 NOT LOCATED IN M/B DATASET 2025. (NJORD SURVEY HI1892, DTD 04.04.2025). NFA.