Surveying Details
H1787/16 20.3.16 SUNK IN 522620N, 014750E. (AUTHORITY NOT STATED). - FNM 151/16. 1923 NOW CHARTED AS DW. BA 1543 & BA 1408. H2723/24 22.4.24 G CONL BUOY, GPFL(3)G.10S, LAID 40YD E OF WK. (TH, GT YARMOUTH 16.4.24). - NM 649/24. H2723/24 29.4.24 MARKED BY WK MARKING VESSEL, GPFL(3)G.10S, BELL. (TH NMS 21 & 22/24). - NM. H4424/24 30.6.24 AMEND TO WK 7FMS 3FT [45FT]. DELETE WK MARKING VESSEL. (AUTHORITY NOT STATED). BR STD. H8304/29 11.12.29 AMEND TO F IN 522622N, 014751E. (AUTHORITY NOT STATED). BA 1543. H03774/45 1.4.46 NOT FOUND. (HMS SCOTT, SURVEY [E7604], 1945). H2098/74 29.1.76 EXAM'D 28.9.75 BY HMS ECHO IN 522624N, 014751E USING HIFIX [2 LOP] & HSA. LEAST E/S DEPTH 15 IN GEN DEPTH 20MTRS. SCOUR DEPTH 21MTRS. DRIFT SWEPT CLEAR AT 16.3, FOUL AT 16.8MTRS [1MTR SWELL EXPERIENCED]. RECOMMEND ACCEPT SWEPT DEPTH. (SOISS, HI 15/75). CHART AS SW 16.3MTRS [8FMS 3FT] IN REVISED POSN. R/P. H4658/71 29.11.77 NOT FOUND DURING SONAR SEARCH. (HMS ENTERPRISE, R-OF-S 25.10.77). NCA. H2098/74 19.12.78 EXAM'D 6.9.78 IN 522624N, 014750E USING HIFIX/6 [2 LOP]. LEAST E/S DEPTH 15.2 IN GEN DEPTH 20-21MTRS. SCOUR DEPTH 21.8MTRS. DCS3 HT 5MTRS, LENGTH OVER 250FT. LIES N/S GIVING GOOD SONAR RESPONSE FROM E, W & S. APPARENTLY LIES ON TOP OF SANDWAVE, THE MOVEMENT OF WHICH MAY ACCOUNT FOR DEPTH SHOALER THAN PREVIOUSLY SWEPT DEPTH. SHOULD BE WIRE-SWEPT AT NEXT ROUTINE SURVEY. (HMS ENTERPRISE, HI 64A/78). AMEND TO WK 15.2MTRS. - NM 66/79. H2098/74 10.10.79 EXAM'D 25.6.79 IN 522622.3N, 014752.4E USING HIFIX/6 [2 LOP]. LEAST E/S DEPTH 16.7 IN GEN DEPTH 22MTRS. SCOUR 1MTR DEEP. LIES 030/210DEGS, WITH SMALL CONTACTS 30MTRS NNE. LENGTH ABT 100MTRS. NOT SWEPT AS SANDWAVE, DEPTH 16MTRS, LIES WITHIN 50MTRS E OF WK. (HMS EGERIA, HI 63A/79). NCA. H1960/79 29.10.80 EXAM'D 11.9.80 IN 522622.2N, 014751E USING HIFIX/6 [2 LOP]. SWEPT CLEAR AT 15.9 FOUL AT 16.2MTRS. LEAST E/S DEPTH 16.2 IN GEN DEPTH 21MTRS. DCS3 HT 5MTRS. LIES 020/200DEGS IN AN AREA OF SANDWAVES 4-5MTRS HIGH. SCOURS, ABT 1MTR DEEP, ON EITHER SIDE OF WK. (HMS ECHO, HI 62A/80). AMEND TO SW 15.9MTRS IN 522622N, 014751E. BR STD. HH090/546/01 8.7.92 EXAM'D 21.5.92 IN 522622.4N, 014751.2E [OGB] USING 3-RANGE TRISPONDER. SWEPT CLEAR AT 15.7, FOUL AT 16.0MTRS. LEAST E/S DEPTH 16.4 IN GEN DEPTH 20.5MTRS. NO SCOUR. DCS3 HT 2.6MTRS, LENGTH APPROX 80MTRS. LIES 030/210DEGS. GIVES GOOD SONAR AND MAGNETOMETER RESPONSE. (NP 1016, HI 546). AMEND TO SW 15.7MTRS IN 522622.5N, 014715E [OGB]. BR STD. HH090/664/01 5.7.95 LOCATED BY CHANCE 'ON TOP'. NOT EXAMINED. (NP 1016, HI 664). NCA. SEP 2016/000091758 24.7.17 EXAM'D 17.12.16 IN 5226.410N, 0147.746E [WGD]. LEAST M/B DEPTH 15.89MTRS IN GEN DEPTH 19MTRS, LENGTH 112.5MTRS, WIDTH 20.7MTRS, HEIGHT 4.3MTRS, ORIENTATION 024/204 DEGS. SCOUR LENGTH 72MTRS, 6.4MTRS DEEP, TOWARDS 012 DEGS. (GARDLINE, HI 1494). AMEND DW 15.8MTRS IN REVISED POSN.