Ub 21 Wreck

Field Value
Wreck Category dangerous wreck
Ub 21 Wreck Location
Marine Coordinates (DMM) 		50 44.285 N,1 1.595 W
Latitude, Longitude
Decimal Degrees
  • Latitude: 50.738083
  • Longitude: -1.026583
Wreck Depth 4.4 m
Water Depth 5 m
Water Level Effect always under water/submerged
Vertical Datum Approximate Lowest Astronomical Tide
Name UB 21
Type submarine
Length 36 m
Width 4.3 m
Sonar Length 28.1
Sonar Width 6.7
Shadow Height 1.6
Orientation 85
Tonnage 292
Tonnage Type displacement
Conspic Visual not visually conspicuous
Conspic Radar not radar conspicuous
Date Sunk Jan 1, 1920
Bottom Texture Sand
Original Detection Year 1921
Last Detection Year 2013
Original Source other
Surveying Details H6429/21 15.10.21 H6429/21 15.10.21 WK DEMOLISHED. SWEEP CARRIED OUT TO DEPTH OF 8-10FT AT LW. NO OBSTN FOUND. (C-IN-C PORTSMOUTH, 27.9.21). NCA. H6429/21 9.12.21 H6429/21 9.12.21 WK IN 504415N, 010131W. LEAST DEPTH OVER 11FT. (CDR MAY, SURVEY NOV '21). CHART AS WK 1.75FMS. - NM 22/22. H1181/51 12.3.51 H1181/51 12.3.51 DRIFT SWEPT IN 504414N, 010132W, OR 113DEGS, 18.7C FROM HORSE SAND FORT LT. CLEAR AT 13FT, FOUL AT 14FT IN GEN DEPTH 18FT. 75FT LONG, LYING 030/210DEGS. (SCES, 17.5.50). AMENDED TO WK 2FMS 1FT IN REVISED POSN. NOTE. H1179/51 9.8.51 H1179/51 9.8.51 FURTHER SURVEY DATA. (SCES, 5.2.51). NCA. H3359/59 6.7.60 H3359/59 6.7.60 FOULED DURING SWEEP FOR UNDINE. EXAM'D BY DIVERS. LEAST DEPTH CONFIRMED AS 13FT IN GEN DEPTH 15FT. (SCES, 1959). NCA. H4661/68 6.6.68 H4661/68 6.6.68 NOT LOCATED OR SEARCHED FOR. (FSL WATERWITCH, SCES, 22.1.68). NCA. H3409/70 24.7.70 H3409/70 24.7.70 WK DIVED ON 19.7.70. LOCATED AS CHARTED. VERY BROKEN UP WITH WRECKAGE SPREAD OVER AN AREA 100FT WIDE & STANDING ABOUT 6FT ABOVE SEABED IN SEVERAL PLACES. (J BEVAN, 21.7.70). NCA. H6872/68 2.9.70 H6872/68 2.9.70 LATEST SURVEY DETAILS TO NAVAL LAW & DGDC IN REPLY TO REQUEST DTD 24.8.70.17.12.70 SOLD TO R J TODD, BUCKLAND, PORTSMOUTH. (DC22(1)54707/70 DGDC). NCA. 15.6.71 15.6.71 NOW CHARTED AS WK 3.3MTRS. NC 2050. H2377/75 10.4.75 H2377/75 10.4.75 CHARTED POSN COVERED BY LINE OF SOUNDINGS. ONLY INDICATION A SHALLOW DIP IN SEABED. NO FURTHER ACTION TAKEN. (SCES, 1974). H4824/75 7.2.78 H4824/75 7.2.78 LOCATED 8.9.77 IN 504414.6N, 010131.7W [OGB] USING HSA. SONAR CONFIRM EXTENT OF WK AS REPORTED BY MR BEVAN. LEAST E/S DEPTH 4.3 IN GEN DEPTH 5.2MTRS. SCOUR DEPTH 5.8MTRS. (SCES, H270 AMENDMENT). AMEND TO WK 4.3MTRS IN REVISED POSN. R/S. H1720/65 12.9.78 H1720/65 12.9.78 WELL DISPERSED, SILTED UP & MOSTLY FLAT ON THE SEABED. HIGHEST PARTS STAND 6FT - ISOLATED PIECES OF TWISTED PLATING. DIFFICULT TO LOCATE WITH E/S. (M WALSH, 20.8.78). NCA. H2071/82 13.3.86 H2071/82 13.3.86 EXAM'D 28.10.85 IN 504415.3N, 010131.5W [OGB] USING TRISPONDER [3 LOP]. LEAST E/S DEPTH 4.4MTRS IN GEN DEPTH 5MTRS. SCOUR DEPTH 5.8MTRS. WELL DISPERSED AND NOT GENERALLY PROTRUDING ABOVE SEABED. APPARENTLY LYING E/W. (HMSML GLEANER, HI 142). AMEND TO WK 4.4MTRS IN REVISED POSN. BR STD. H3847/86 4.1.90 H3847/86 4.1.90 EXAM'D 16.6.89 IN 504414.8N, 010130.5W [OGB] USING TRISPONDER. LEAST E/S DEPTH 4.4 IN GEN DEPTH 5MTRS. SCOUR 0.5MTR DEEP. DCS3 HT 0.6MTR. LIES 035/315DEGS WITH VERY LITTLE STANDING PROUD OF SEABED. (HMSML GLEANER, HI 366). AMEND POSN. BR STD. 16.10.13 16.10.13 EXAM'D 3.7.13 IN 5044.285N, 0101.595W [WGD]. LEAST M/B DEPTH 4.4 IN GEN DEPTH 6MTRS. NO SCOUR. LENGTH 28.1MTRS, WIDTH 6.7MTRS, HT 1.6MTRS. LIES 085/265 DEGS. MODERATE MAGNETIC ANOMALY. VERY BROKEN UP, PARTS OF WK DISPERSED AROUND SITE. (NETSURVEY, HI 1437). RETAIN WK 4.4MTRS IN REVISED POSN.
Last Amended Date Oct 16, 2013

Circumstances of loss

COASTAL CLASS SUB, BUILT 1916, SANK EN-ROUTE TO BREAKERS.

General Comments

WELL BROKEN UP

WRECK MAP LOADING ... 50 44.285 N,1 1.595 W
Ub 21 on Wreck Map Ub 21 Wreck on Google Map

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FAQ

Where is the UB 21 wreck located?

The UB 21 wreck is located at coordinates 50 44.285 N,1 1.595 W.

How deep is the UB 21 and where exactly is it located?

The UB 21 lies at a depth of about 4.4 meters and is located at coordinates 50 44.285 N,1 1.595 W.

How deep is the seabed around the UB 21?

The seabed around the UB 21 lies at approximately 5 meters deep.

When did the UB 21 sink?

The UB 21 sank on Jan 1, 1920.

When was the wreck of the UB 21 discovered?

The wreck of the UB 21 was discovered in 1921.

What was the tonnage of the UB 21?

The UB 21 had a tonnage of 292 tons.

What type of wreck is the UB 21?

The UB 21 is classified as a submarine.

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