Hms Mastiff (Possibly) Wreck

Field Value
Wreck Category dangerous wreck
Hms mastiff (possibly) Wreck Location
Marine Coordinates (DMM) 		51 30.3 N,1 27.5 E
Latitude, Longitude
Decimal Degrees
  • Latitude: 51.505000
  • Longitude: 1.458333
Wreck Depth 15.3 m
Water Depth 17 m
Water Level Effect always under water/submerged
Vertical Datum Approximate Lowest Astronomical Tide
Name HMS MASTIFF (POSSIBLY)
Type trawler
Flag GB
Length 45.7 m
Width 8.2 m
Sonar Length 50
Sonar Width 10
Shadow Height 1.6
Orientation 100
Tonnage 520
Tonnage Type gross
Conspic Visual not visually conspicuous
Conspic Radar not radar conspicuous
Date Sunk Nov 20, 1939
Bottom Texture Mud
Scour Dimensions ,,001.5,000
Original Detection Year 1939
Last Detection Year 2009
Original Source other
Surveying Details H0166/39 20.11.39 H0166/39 20.11.39 SANK 093DEGS, 1M FROM TONGUE LTV. (C IN C NORE). - PNM 2641/39. H1602/47 26.3.47 H1602/47 26.3.47 EXAM'D 24.9.46 IN 513015N, 012736E OR 077.75DEG, 3.54M FROM TONGUE SAND TWR. SWEPT CLEAR AT 40FT, FOUL AT 41.5FT. SMALL CONTACT, GAVE SLIGHT A/S TRACE. (HMS FRANKLIN, 1.11.46 E7934). - NM 785/47. H1602/47 10.7.50 H1602/47 10.7.50 NOW CLEAR AT 50FT. (C IN C NORE, 10.7.50). H1602/47 11.10.50 H1602/47 11.10.50 AMEND TO WK 7FMS 3FT. (HMS FRANKLIN). - NM 1953/50. H926/62 15.3.62 H926/62 15.3.62 LOCATED USING HSA & DECCA. DRIFT SWEPT CLEAR AT 47FT, FOUL AT 49FT. LEAST E/S DEPTH 55FT IN GEN DEPTH 59FT. SCOUR DEPTH 67FT. (HMS ECHO, 10.10.61). NC 1607. H351/67 25.1.67 H351/67 25.1.67 LEAST E/S DEPTH 53FT IN GEN DEPTH 58FT. SCOUR DEPTH 62FT. (ISS, R OF S 26.12.66). 27.1.69 27.1.69 WK 7FMS 4FT [LAT] SHOWN ON NE 1607. 13.6.72 13.6.72 CHART AS WK SW 14MTRS [LAT]. NC 1828. 10.11.82 10.11.82 CHART AS WK SW 14MTRS IN 513017N, 012741E. NC 1183. H2050/82 23.2.84 H2050/82 23.2.84 EXAM'D 22.11.83 IN 513017N, 012738E USING HIFIX 6 [2 LOP]. LEAST E/S DEPTH 15.6MTRS IN GEN DEPTH 17.5-18MTRS. SCOUR DEPTH 18.5MTRS. DCS3 HT 1.9MTRS. LYING APPROX 280/100 DEGS. SMALL DETACHED PIECES OF WKGE NEARBY. REQUIRES TO BE WIRE SWEPT. (HMS EGERIA, HI 123, WK 25). NCA, RETAIN SWEPT DEPTH. H3936/88 15.2.90 H3936/88 15.2.90 EXAM'D 8.9.89 IN 513017N, 012738E [OGB] USING TRISPONDER [5 LOP]. SWEPT CLEAR AT 15.8MTRS, FOUL AT 15.9MTRS. LEAST E/S DEPTH 15.8MTRS IN GEN DEPTH 17.5MTRS. SCOUR DEPTH 18.1MTRS. DCS3 HT 1.6MTRS. BROKEN UP, LYING 110/290DEGS APPROX. GIVES MAGNETOMETER DEFLECTION. (NP 1016, HI 458). - NM 691/90. HH090/667/01 4.1.96 HH090/667/01 4.1.96 EXAM'D 27.7.95 IN 513018.94N, 012730.00E [WGD] USING DGPS. SWEPT CLEAR AT 15.5MTRS, NOT FOULED. LEAST E/S DEPTH 15.8MTRS IN GEN DEPTH 17.0MTRS. SCOUR DEPTH 0.3MTRS. DCS3 HT 1.9MTRS. LENGTH 57MTRS, WIDTH 12MTRS. LIES 097/277DEGS. GOOD MAGNETIC ANOMALY. UPRIGHT AND SEMI BURIED. BROKEN IN TWO WITH 25MTRS BETWEEN THE PARTS. (OCEONICS, HI 667). SWEEP NOT COMPLETE. RETAIN AS WK SW 15.8MTRS. NCA. HH091/269/01 9.2.09 HH091/269/01 & SEP 2009/000017145 9.2.09 EXAM'D 8.9.08 IN 5130.300N, 0127.500E [WGD] USING DGPS. LEAST M/B DEPTH 15.4MTRS IN GEN DEPTH 17MTRS. NO SCOUR ON MAIN PART. MAIN PART: LENGTH 75MTRS, WIDTH 10MTRS, HT 1.6MTRS. LIES 100/280 DEGS. SMALLER PART: LENGTH 10MTRS, WIDTH 10MTRS, HT 1.6MTRS. LIES 10MTRS NE OF MAIN PART. (MARIN MATTEKNIK, HI 1269). ?MAIN BOW AND STERN PORTIONS IN LINE (LENGTH C 50MTRS), WITH CENTRE PART (?BOILER/ENGINE) DISPLACED NE. SCOUR 1.5MTRS DEEP AT SMALLER PART. AMEND WK 15.4MTRS IN REVISED POSN. - NM 1729/09. 24.7.09 SEP 2009/000097975 24.7.09 SURVEY DATA REVIEWED. AMEND WK 15.3MTRS. BR STD.
Last Amended Date Jul 24, 2009

Circumstances of loss

BUILT IN 1938 BY ROBB, LEITH. OWNED AT TIME OF LOSS BY THE ROYAL NAVY. PURPOSE BUILT AS A MINESWEEPER, BASED ON A TRAWLER HULL. ONE BOILER, TRIPLE EXPANSION ENGINE OF 950 NHP, SINGLE SHAFT. 1 X 4 INCH, 2 X .303 INCH MACHINE GUNS. MINED IN THAMES ESTUARY. (WW2 SL & SIBI).

General Comments

WELL BURIED, ?UPRIGHT, IN TWO PARTS WITH DEBRIS

WRECK MAP LOADING ... 51 30.3 N,1 27.5 E
Hms Mastiff (Possibly) on Wreck Map Hms Mastiff (Possibly) Wreck on Google Map

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FAQ

Where is the HMS MASTIFF (POSSIBLY) wreck located?

The HMS MASTIFF (POSSIBLY) wreck is located at coordinates 51 30.3 N,1 27.5 E.

How deep is the HMS MASTIFF (POSSIBLY) and where exactly is it located?

The HMS MASTIFF (POSSIBLY) lies at a depth of about 15.3 meters and is located at coordinates 51 30.3 N,1 27.5 E.

How deep is the seabed around the HMS MASTIFF (POSSIBLY)?

The seabed around the HMS MASTIFF (POSSIBLY) lies at approximately 17 meters deep.

When did the HMS MASTIFF (POSSIBLY) sink?

The HMS MASTIFF (POSSIBLY) sank on Nov 20, 1939.

When was the wreck of the HMS MASTIFF (POSSIBLY) discovered?

The wreck of the HMS MASTIFF (POSSIBLY) was discovered in 1939.

What country did the HMS MASTIFF (POSSIBLY) belong to?

The HMS MASTIFF (POSSIBLY) belonged to GB.

What was the tonnage of the HMS MASTIFF (POSSIBLY)?

The HMS MASTIFF (POSSIBLY) had a tonnage of 520 tons.

What type of wreck is the HMS MASTIFF (POSSIBLY)?

The HMS MASTIFF (POSSIBLY) is classified as a trawler.

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