Location


Geophysical survey dimensions and notes


495730 E 5845816 N (UTM31N)


WA ID 71020: Unknown wreck (UKHO 11212) Dimensions: 58.7m x 24.7m x 1.6m


This is an unidentified wreck made up of very dispersed wreck remains originally detected in 1994 and located in the very northern extent of East Anglia THREE. The wreck remains comprise tens of hard edged and diffuse dark reflectors with shadows which are visible as individual structural elements making up the highly broken up and abraded remains on the seabed. The geophysical datasets and small height measurement taken from the vessel indicates that it lies quite flat on the seabed. There is a very large magnetic anomaly associated with this wreck visible as a dipole anomaly present across four survey lines and measuring 7682nT.


Build Type Loss


Construction Dimensions Shipyard Cause


Extent of Survival Unknown Unknown


Unknown Unknown Unknown


The UKHO record this as an unknown wreck that was first detected in 1994 (SeaZone 11212). The survey data indicates the presence of an entire wreck, highly broken up, lying approximately northeast-southwest and located to the south-west of a shoaler sandwave, the crest of which is generally 1m higher than the wreck. This area of the seabed has frequent sand waves, these could be concealing more of the wrecks structure and possibly associated debris and/or cargo. This is recorded as a Live wreck.


2°40'0"E F 71020 2°50'0"E 3°0'0"E 0 1:1000 Sidescan sonar image of wreck 58.7m x 24.7m x 1.6m Multibeam bathymetry image looking north x1 vertical exaggeration 40m


Area


East Anglia THREE F Depth


Metres LAT (lowest


astronomical tide) -32.40


-36.00


Datum: WGS84 Projection: UTM31N


Legend


East Anglia THREE offshore windfarm East Anglia THREE Offshore Cable Corridor Wreck1


Notes: © ESRI 2°40'0"E 2°50'0"E


C B


Rev A


12/05/14 KL 22/04/14 KL


28/02/14 KL Date


Third issue


Second Issue First Issue


By Comment 1. Chapter 17, Table 17.15 and Appendix 17.3, Tables 1.2.1 and 1.2.2. 3°0'0"E


Original A3 Plot Scale


1:250,000 (map) © East Anglia Offshore Wind Limited 2014. 0 3 6km 0 2


4nm East Anglia Offshore Wind Unknown wreck (UKHO 11212)


Date Rev


Drg No EA3-650-525W-025-C C


Layout


12/05/2014 N/A


Figure 17.25


Magnetic profile of wreck 7682nT Distance along profile


52°30'0"N


52°40'0"N


Mag field (nT)


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