Surveying Details
H01842/41 23.5.41 BOMBED IN 523405N, 014535E. (FOIC YARMOUTH, 23.6.41). PFNM ISSUED. H01842/41 2.8.41 INS AS DW. - NM 1814/41. H05317/44 AMEND TO WK 19FT. (AUTHORITY NOT STATED). - NM 113/45. H01842/41 3.6.49 WIRE SWEEP AFTER DISPERSAL - AREA OF RADIUS 600FT FROM REPD POSN SWEPT CLEAR AT 33FT. GENERAL DEPTH 36FT. (SML 4, 23.5.49). AMEND TO WK 33FT. - NM 1145/49. H1333/60 10.5.60 POSN DRIFT SWEPT. AREA CLEAR AT 33FT, FOUL AT 34FT IN 523402N, 014541E. POSN BY HSA. NOT FOUND BY E/S BUT SCOUR, DEPTH 40FT, EXISTS NEAR POSN. (ECES, 1959). AMEND POSN. - NM 1046/60. H2358/65 2.9.65 NOT FOUND. (SURVEY [K4594]). AMEND TO FOUL. - NM 1613/65. H3570/67 29.11.67 NOTHING LOCATED WITHIN 5 CABLES OF POSN. (HMS ECHO, R-OF-S DTD 15.9.67). DELETED. BR STD. H4213/71 23.2.72 NOT FOUND. (SOISS, R-OOF-S DTD 13.8.71). H4403/71 7.11.73 TWO CONTACTS ON TRANSIT SONAR IN 523405N, 014551E. POSN BY HIFIX/6 [2 LOP]. INDICATES PROBABLE FOUL AREA. NOT FOUND BY E/S. (HMS EGERIA). INS AS FOUL. BR STD. H4403/71 29.1.76 NOT FOUND. (HMS ENTERPRISE, HI 16/75). H4658/71 10.11.77 NOT FOUND. PROBABLY COMPLETELY BURIED. (HMS ENTERPRISE, HI 55/77). H4403/71 15.11.79 NOT FOUND. (SOISS, HI 63B/79). DELETED. BR STD. H2548/88 28.10.88 FOLLOWING REPORT FROM RACAL SURVEY, EXAM'D WK IN 523401N, 014620E ON 24.10.88 USING HSA. LEAST E/S DEPTH 11.9 IN GEN DEPTH 14MTRS. SCOUR 1MTR DEEP. DCS3 HT 2.5MTRS. SONAR TRACE SHOWS ILL-DEFINED OBJECT OF APPROX 15MTRS HORIZONTAL EXTENT E/W. SONAR EXAMINATION NOT ACHIEVED DUE PROXIMITY OF CORTON SAND AND STRONG N/S TIDAL STREAM. (NP 1008, H525 24.10.88). INS AS WK 11.9MTRS. - NM 3406/88. HH090/513/01 13.6.91 EXAM'D 28.4.91 IN 523401N, 014620E [OGB] USING TRISPONDER [4 LOP]. SWEPT CLEAR AT 11.9, FOUL AT 12.0MTRS. LEAST E/S DEPTH 13.3 IN GEN DEPTH 14MTRS. DCS3 HT 0.6MTR. SCOUR DEPTH 15MTRS. DISTINCT CONTACT, LYING 350/170DEGS AND GIVING GOOD SONAR SHADOW. (NP 1016, HI 513). AMEND TO SW 11.9MTRS. BR STD. HH090/513/01 15.7.91 FOLLOWING RE-ASSESSMENT OF TIDAL REDUCTION, WK NOW SWEPT CLEAR AT 11.5MTRS. OTHER DATA UNCHANGED. (NP 1016, HI 513). BR STD. HH090/734/01 28.4.97 EXAM'D 27.3.97 IN 523401.0N, 014619.7E [OGD] USING DGPS. SWEPT CLEAR 11.9, FOUL 12.2MTRS. LEAST E/S DEPTH 11.7 IN GEN DEPTH 14.5MTRS. SCOUR DEPTH 1MTR. DCS3 HT 2.5MTRS. SMALL MAGNETIC ANOMALY. LENGTH 30MTRS, WIDTH 5MTRS. LIES 000/180DEGS. IN ONE PARTIALLY BURIED PIECE. (NP 1016, HI 734). INS AS SW 11.7MTRS. BR STD. HH090/848/01 2.6.99 LOCATED, NOT EXAMINED. IN ONE PIECE, PARTIALLY BURIED. (NP 1016, HI 848). NCA. HH091/111/01 10.8.05 EXAM'D 20.4.05 IN 5234.045N, 0146.219E [WGD] USING DGPS. SWEPT CLEAR 12.5, FOUL 12.8MTRS. LEAST E/S DEPTH 11.7 IN GEN DEPTH 15MTRS. SCOUR 2MTRS DEEP EXTENDS 50MTRS TOWARDS 170/350 DEGS. LENGTH 31MTRS, WIDTH 12MTRS, HT 4MTRS. LIES 120/300 DEGS. STRONG MAGNETIC ANOMALY. (NP 1016, HI 1111). RETAIN SW 11.7MTRS IN REVISED POSN. BR STD. HH091/220/01 28.8.07 LOCATED, NOT EXAM'D. LEAST M/B DEPTH 11.98MTRS. LENGTH 25MTRS, WIDTH 7MTRS, HT 3.5MTRS. (NETSURVEY LTD, HI 1220). NCA. HH091/260/01 23.10.08 EXAM'D 4.6.08 IN 5234.045N, 0146.220E [WGD] USING DGPS. LEAST M/B DEPTH 12.04 IN GEN DEPTH 15.0MTRS. SCOUR 1.5MTRS DEEP EXTENDS 50MTRS TOWARDS 190 DEGS. LENGTH 23MTRS, WIDTH 8MTRS, HT 3.0MTRS. LIES 130./310 DEGS. APPEARS TO BE UPRIGHT AND PARTIALLY BURIED. (NETSURVEY, HI 1260). NCA. 23.2.11 EXAM'D 14.8.10 & 16.11.10 IN 5234.046N, 0146.219E [WGD]. SWEPT CLEAR 12.1, FOUL 12.3MTRS. LEAST M/B DEPTH 11.89MTRS (11.67MTRS IN WATER COLUMN). NO SCOUR. LENGTH 22MTRS, WIDTH 6MTRS, HT 2.5MTRS. LIES 130/210 DEGS. APPEARS PARTLY BROKEN UP, UPRIGHT AND PART COVERED BY SEDIMENT. (MMT, HI 1338). SWEEP SIGNIFICANTLY SHOALER THAN M/B DEPTH. RETAIN SW 11.7MTRS. NCA. SEP 2017/000186964 22.4.18 EXAM'D 14.7.17; OBSERVED IN 5234.045N, 0146.219E [WGD]. LEAST M/B DEPTH 11.89MTRS IN GENERAL DEPTH 14MTRS. WK LENGTH 24.6MTRS, WIDTH 8.0MTRS, HT 4.5MTRS, ORIENTATION 128/308DEGS. SCOUR TRENDING ON NORTH AND SOUTH SIDE, LENGTH 28.6MTRS, DEPTH 1.73MTRS TOWARDS 159DEGS. RECTANGULAR WK WITH CYCLINDRICAL FEATURE IN CENTRAL SECTION. [EGS, HI 1545]. AMEND DW 11.8MTRS. SEP 2021/000000486 10.10.20 EXAM'D 10.10.20; OBSERVED IN 5234.045N, 0146.219E [WGD]. LEAST M/B DEPTH 11.94MTRS IN GENERAL DEPTH 15MTRS. WK LENGTH 17.2MTRS, WIDTH 4.52MTRS, HT 3.2MTRS, ORIENTATION 310DEGS. SCOUR LENGTH 21.6MTRS, DEPTH 1.2MTRS, WIDTH 19.19MTRS, ORIENTAION 360DEGS. [FPV MORVEN, HI 1687]. NFA. RSDRA2023000310583 12.12.23 LOCATED IN M/B DATASET (2023). LEAST M/B DEPTH 11.98MTRS. DEEPER THAN CHARTED. NFS. (CLINTON MARINE SURVEY, HI1827). NFA.