Thyra Wreck

Field Value
Wreck Category dangerous wreck
Thyra Wreck Location
Marine Coordinates (DMM) 		51 57.009 N,1 38.567 E
Latitude, Longitude
Decimal Degrees
  • Latitude: 51.950150
  • Longitude: 1.642783
Wreck Depth 15.4 m
Water Depth 25 m
Water Level Effect always under water/submerged
Vertical Datum Approximate Lowest Astronomical Tide
Name THYRA
Type steam ship
Flag SE
Length 82 m
Width 12.8 m
Draught 5.5
Sonar Length 84
Sonar Width 20
Shadow Height 9.6
Orientation 103
Tonnage 1796
Tonnage Type gross
Cargo timber
Conspic Visual not visually conspicuous
Conspic Radar not radar conspicuous
Date Sunk Feb 28, 1942
Bottom Texture 1,4,6
Scour Dimensions 800.0,004.0,211.0
Original Detection Year 1942
Last Detection Year 2016
Original Source national HO/authority notice to mariners
Last Amended Date Jul 18, 2016

Simplified Wreck Survey

UK Hydrographic Office wreck survey details for the THYRA, located at coordinates 51 57.009 N, 1 38.567 E. The historic underwater obstruction has been extensively surveyed and monitored since 1942. Modern multibeam sonar examinations record the wreck lying on its port side, oriented at 103/283 degrees, perpendicular to the tidal current flow. The substantial submerged structure measures approximately 84 meters in length, 20 meters in width, with a height of 9.6 meters, resting in a general water depth of 25 meters with a least depth of 15.4 meters. Surveys note a significant scour length of 800 meters and 4 meters deep, alongside a strong magnetic anomaly and heavy netting reported by divers.

Surveying Details

H0984/42 16.5.42 WK, NOT DANGEROUS TO NAVIGATION, IN 515700N, 013845E. INS AS NDW. - NM 1016/42. 8.5.68 AMEND TO DW. LC 1610, 2052. H3161/69 26.10.71 INS DW ON 1504, (MISS SCALE). (BP TANKERS, 14.10.71). - NM 1732/71. H3821/72 29.8.72 AMEND TO USC 8FMS. - NM 1579/72. 21.9.72 AMEND TO USC 15.0MTRS. NC 2052. H3821/72 13.7.73 LEAST DEPTH OVER WK 7FMS 3FT. (WESTMINSTER GRAVELS, 1.7.73). - NM 1434/73. H4139/76 11.1.77 LOCATED 7.8.76 IN 515700N, 013839E [OGB] USING HIFIX/6 [2 LOP]. SWEPT CLEAR AT 13.9, FOUL AT 14.2MTRS. LEAST E/S DEPTH 15.6MTRS IN GEN DEPTH 25MTRS. SCOUR DEPTH 26MTRS. LARGE WK - 90 X 60MTRS, APPROX. LYING NE/SW. SIGNS OF CONSIDERABLE BREAK-UP AT NORTHERN END. (HMS BEAGLE, HI 31/76). BR STD. H3186/73 21.2.79 EXAM'D 9.8.78 IN 515659N, 013840E [OGB] USING HIFIX/6 [2 LOP]. LEAST E/S DEPTH 15.4 IN GEN DEPTH 24-25MTRS. SONAR HT 8.6MTRS, LENGTH OVER 200FT. LIES WNW/ESE GIVING GOOD SONAR RESPONSE FROM ALL DIRECTIONS. DEEP HOLE TO N OF WK, WHICH WHILE DETACHED, MAY BE SCOUR WITH DEPTH 28MTRS. (HMS ENTERPRISE, HI 60C/78). NCA. H1940/80 1.4.82 EXAM'D 12.11.81 IN 515659N, 013843 [OGB] USING HIFIX/6 [2 LOP]. LEAST E/S DEPTH 15.9 IN GEN DEPTH 25MTRS. SCOUR 2.5MTRS DEEP. LYING 120/300 DEGS. NOT FULLY SURVEYED. (SOISS, HI 9, WK 15). NCA. H1940/80 23.9.87 MR JOHN PERKINS, INTENDING TO DIVE ON THIS WK 22.8.87 REPORTED STRONG UPWELLING OVER AN AREA OF APPROX 50FT DIAMETER IN VICINITY, WITH SAND, SHINGLE & SHELL BEING DISTURBED. THE PHENOMENON CONTINUED FOR AN HOUR. OBTAINED E/S DEPTH OVER WK OF 12MTRS. (THAMES MRSC, TELEX 24.8.87). NCA. HH090/667/01 20.12.95 EXAM'D 23.7.95 IN 515700.27N, 013835.02E [WGD] USING DGPS. SWEPT CLEAR 15.2, FOUL 15.4MTRS. LEAST E/S DEPTH 15.8 IN GEN DEPTH 25.0MTRS. SCOUR DEPTH 2.6MTRS. DCS3 HT 8.1MTRS. LENGTH 80MTRS, WIDTH 18MTRS. LIES 095/275 DEGS. STRONG MAGNETIC ANOMALY. LYING ON ITS SIDE. DIVER'S REPORT STATES THAT THE WK IS HEAVILY NETTED. (OCEONICS, HI 667). NOT FULLY SWEPT, RETAIN AS SW 13.9MTRS IN REVISED POSN. BR STD. SEP 2015/000083463 18.7.16 EXAM'D 22.2.16 IN 5157.009N, 0138.567E [WGD]. LEAST M/B DEPTH 15.4MTRS IN GEN DEPTH 25MTRS. LENGTH 84MTRS, WIDTH 20MTRS, HT 9.6MTRS, ORIENTATION 103/283. SCOUR LENGTH 800MTRS, 4MTRS DEEP TOWARDS 211DEGS. STRONG MAGNETIC ANOMALY. WK LYING ON ITS PORT SIDE SIDE. POSITIONED PERPENDICULAR TO THE TIDAL CURRENT FLOW. (MMT, HI 1474). AMEND DW 15.4MTRS IN REVISED POSN.

Circumstances of loss

BUILT IN 1925 BY FREDRIKSTAD MEK VAERKS, FREDRIKSTAD. OWNED AT TIME OF LOSS BY A/B TRANMARIN. TWO BOILERS, TRIPLE EXPANSION ENGINE OF 187HP, SINGLE SHAFT. PASSAGE HARTLEPOOL FOR LONDON. CARGO 752 STANDARDS OF TIMBER. STRUCK A MINE AND WAS TAKEN IN TOW. LATER SANK.

General Comments

Wk partially buried

WRECK MAP LOADING ... 51 57.009 N,1 38.567 E
Thyra on Wreck Map Thyra Wreck on Google Map

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FAQ

Where is the THYRA wreck located?

The THYRA wreck is located at coordinates 51 57.009 N,1 38.567 E.

How deep is the THYRA and where exactly is it located?

The THYRA lies at a depth of about 15.4 meters and is located at coordinates 51 57.009 N,1 38.567 E.

How deep is the seabed around the THYRA?

The seabed around the THYRA lies at approximately 25 meters deep.

When did the THYRA sink?

The THYRA sank on Feb 28, 1942.

When was the wreck of the THYRA discovered?

The wreck of the THYRA was discovered in 1942.

What country did the THYRA belong to?

The THYRA belonged to SE.

What cargo was the THYRA carrying?

The THYRA was carrying timber.

What was the tonnage of the THYRA?

The THYRA had a tonnage of 1796 tons.

What type of wreck is the THYRA?

The THYRA is classified as a steam ship.

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