Caisson Wreck 47092

Field Value
Wreck Location
Marine Coordinates (DMM) 		50 45.407 N,0 54.788 W
Latitude, Longitude
Decimal Degrees
  • Latitude: 50.756783
  • Longitude: -0.913133
Wreck Depth -1.7 m
Water Depth 1 m
Water Level Effect covers and uncovers
Vertical Datum Approximate Lowest Astronomical Tide
Type Caisson
Sonar Length 54.5
Sonar Width 50
Shadow Height 5.6
Conspic Visual not visually conspicuous
Conspic Radar not radar conspicuous
Bottom Texture Sand
Scour Dimensions ,,000.5,
Original Detection Year 1955
Last Detection Year 2013
Original Source ship visit/hydrographic note report
Markers S CARD BN ON WK
Surveying Details H5340/52 14.10.55 H5340/52 14.10.55 CONCRETE CAISSON SUNK IN 504523N, 005440W [OGB], 243DEGS, 1.77M FROM E WITTERING WATER TR, 144DEGS, 1.54M FROM EASTOKE PT LT, UNDER ARRANGEMENTS MADE BY RNAS, FORD. TO BE USED AS A TEMPORARY TARGET. (AIR MINISTRY, 9.9.55 & QHM PORTSMOUTH, HN 8/55). - NM 2369/55. H7673/53 H7673/53 1960 CORRESPONDENCE ABOUT MARKING THIS OBSTN. NCA. H769/58 6.12.60 H769/58 6.12.60 AMEND TO PILE, G SPH, TOPMARK, CONCRETE TARGET. (QHM PORTSMOUTH, HN 2/60). - NM 2832/60. H769/58 20.7.62 H769/58 & H7673/53 20.7.62 PILE, WITH B SPH TOPMARK, ESTABLISHED ON BANK 150FT S OF CONCRETE CAISSON. IN GEN DEPTH 7FT [CHART DATUM]. (QHM PORTSMOUTH). BR STD. H718/64 28.3.66 H718/64 & H5808/55 28.3.66 AMEND TO OB WITH W BN, TOPMARK, CLOSE N AND B BN, TOPMARK, CLOSE S. (QHM PORTSMOUTH, 1964). NC 2050. H3950/70 21.4.71 H3950/70 21.4.71 NOW CHARTED AS OB, W BN CLOSE N AND B BN CLOSE S. NC 3418. H718/64 21.7.72 H718/64 21.7.72 AMEND TO ST, WITH BNS CLOSE N AND S. BR STD. [SEE ALSO WK OF 'BEN OLIVER' [20126] IN 504523.01N, 005440W]. H2588/73 9.9.74 H2588/73 9.9.74 BNS REPLACED BY SINGLE BN, G CONL TOPMARK, 75FT S OF ST. (CHICHESTER HBR NM 18/74). - NM 1828/74. H4585/76 25.11.76 H4585/76 25.11.76 BN CLOSE S OF WK DESTROYED. TEMPORARILY REPLACED BY G CONL BUOY, 1C S OF WK. (AQHM PORTSMOUTH). - NM 2288(T)/76. H4585/76 10.6.77 H4585/76 10.6.77 BN RE-ESTABLISHED S OF WK IN 504640N, 005608W [OGB], 145DEGS, 9700FT FM EASTOKE TRIPOD BN. (CHICHESTER LOCAL NM 19/77). H4723/77 28.10.77 H4723/77 28.10.77 LOCATED VISUALLY AT LW IN 504523.5N, 005442W [OGB] USING HSA. CAISSON STILL IN FAIRLY SOUND CONDITION. DRYING HEIGHT CALCULATED AT 3MTRS. (HMS HYDRA, REPORT DTD 15.9.77 & ROS DTD 13.6.77). AMEND TO REVISED POSN, MOVE BN RELATIVE TO WK. BR STD. 11.3.80 11.3.80 DESCRIBED AS PART OF MULBERRY HBR UNIT. (PSA REGISTER OF WK MARKERS). H4585/76 13.8.80 H4585/76 13.8.80 BN TOPMARK AMENDED TO S CARD. (CHICHESTER HBR NM 5/80). BR STD. H2038/82 16.2.84 H2038/82 16.2.84 CONFIRMED VISUALLY. (SCESU, HI 111, 1983). NCA. H2038/82 28.1.87 H2038/82 28.1.87 BN MARKING THIS WK HAS BEEN DESTROYED BY A WATERSPOUT. WILL BE MARKED TEMPORARILY AND LATER A PERMANENT BN WILL BE RE-ERECTED. (TELECON PUGH/CALDERWOOD, PSA, SE REGION HQ, 28.1.87). - NM 402T/87. H2208/84 24.9.87 H2208/84 24.9.87 S CARD BN RE-ESTABLISHED, FIXED TO WK. TEMPORARY BUOY WITHDRAWN. (CHICHESTER HBR CONSERVANCY NM 9/87). NM 402T/87 CANCELLED. - NM 3066/87. H2595/80 15.4.88 H2595/80 15.4.88 S CARD BN MISSING. WK MARKED TEMPORARILY BY S CARD BUOY. (CHICHESTER HBR CONSERVANCY LOCAL NM 7/88). NCA. 16.10.08 16.10.08 [EUT] POSN: 5045.426N, 0054.788W. NE 3418. 14.10.13 14.10.13 LOCATED 23.5.13 IN 5045.407N, 0054.788W [WGD]. LEAST M/B DEPTH DRIES 1.64 IN GEN DEPTH 0.5MTR. LENGTH 54.5MTRS, WIDTH 50MTRS, HT 5.6MTRS. NOW EXTREMELY BROKEN UP. LEAST DEPTH IS ON PIECE OF TARGET CLOSE S. (NETSURVEY, HI 1437). IN SHALLOW SCOUR. AMEND OBSTN DRIES 1.7MTRS IN REVISED POSN.
Last Amended Date Nov 1, 2013

Circumstances of loss

SUNK FOR USE BY RNAS FORD AS A TEMPORARY AIR TARGET.

General Comments

BROKEN UP IN MINOR SCOUR PIT, L/D ON FRAGMENT CLOSE S

WRECK MAP LOADING ... 50 45.407 N,0 54.788 W
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