HERCULES 20

Mobile Offshore Drilling Unit · Offshore class · Built 1960s · USCG Heartland District (CGD-H)

HERCULES 20 is a 1968 mobile offshore drilling unit. The Coast Guard has recorded 21 inspections since 1985, most recently in September 2003, along with 9 deficiencies and 1 casualty investigation in 2003.

Records from 1985 to 2003. Most recent: inspection, 25 September 2003.

Built: 1968
Last inspected: 25 September 2003
Documentation: Not in the documentation file of 10 September 2026
Inspections: 21
Deficiencies: 9 recorded · 0 without a recorded resolution
Controls: None recorded without a removal date
Casualties: 1 investigation · 2003
Also recorded as: 1 other name

Identity

515189

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45937

Flag

UNITED STATES

MMSI

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Maury page id

psix-45937

Inspections, by type

…physical examinations13

…administrative events2

…with no type recorded6

Years with a record 11 calendar years (1985–2003)

The 21 inspections in the strip above, split by the kind of activity the US Coast Guard recorded. Years with a record are calendar years in which a record exists, not years in service. What Maury does not do.

This record may be incomplete: the most recent inspection recorded for this vessel was 23 years ago. Maury shows what the Coast Guard recorded, not whether the vessel has been inspected since, is still in service, or what condition it is in. Coast Guard record current through 13 September 2026, retrieved 18 September 2026 from PSIX. Every field on this page was recorded by the Coast Guard. Records for the Offshore class in Maury's sources begin in 1978.

Documentation record

Tonnage as PSIX records it1234 - Regulatory (Subpart C or D), Gross Ton
1234 - Regulatory (Subpart C or D), Net Ton

This hull's Official Number is not in the NVDC file dated 10 September 2026 as served by NOAA Fisheries, so no documentation record is shown. Absence from that file is a fact about the file, not about the hull.

Radio station licence

No FCC ship-station licence is recorded against this Official Number in the file of 6 September 2026. That is a fact about the licence file, not about the radio.

Inspection history · 21

25 September 2003 Type not recorded

No type recorded · MSO NEW ORLEANS · USCG Heartland District (CGD-H) · Activity 1912747

9 September 1995 Administrative

Administrative · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 879274

8 September 1993 Type not recorded

No type recorded · MSO Mobile · USCG Heartland District (CGD-H) · Activity 525109

30 June 1993 Re-Inspection

Physical examination · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 1440715

17 July 1992 COI Inspection · Hull Examination

Physical examination · MSU GALVESTON · USCG Heartland District (CGD-H) · Activity 951470

7 August 1991 Type not recorded

No type recorded · MSO HOUSTON/GALVESTON · USCG Heartland District (CGD-H) · Activity 665779

5 August 1991 Type not recorded

No type recorded · MSO HOUSTON/GALVESTON · USCG Heartland District (CGD-H) · Activity 665778

15 July 1991 Deficiency Check

Physical examination · MSO HOUSTON/GALVESTON · USCG Heartland District (CGD-H) · Activity 936229

27 June 1991 COI Inspection

Physical examination · MSU GALVESTON · USCG Heartland District (CGD-H) · Activity 941601

24 June 1991 COI Inspection

Physical examination · MSO HOUSTON/GALVESTON · USCG Heartland District (CGD-H) · Activity 904208

20 September 1990 Deficiency Check

Physical examination · MSO HOUSTON/GALVESTON · USCG Heartland District (CGD-H) · Activity 1241464

10 September 1990 Re-Inspection

Physical examination · MSO HOUSTON/GALVESTON · USCG Heartland District (CGD-H) · Activity 1237236

30 October 1989 Type not recorded

No type recorded · MSO Corpus Christi · USCG Heartland District (CGD-H) · Activity 527906

19 July 1989 COI Inspection

Physical examination · MSO Corpus Christi · USCG Heartland District (CGD-H) · Activity 893894

10 August 1988 Re-Inspection

Physical examination · MSO PORT ARTHUR · USCG Heartland District (CGD-H) · Activity 1343988

6 July 1988 Type not recorded

No type recorded · MSO NEW ORLEANS · USCG Heartland District (CGD-H) · Activity 896839

8 October 1987 Administrative

Administrative · MSO ST LOUIS · USCG Heartland District (CGD-H) · Activity 1320577

31 August 1987 Deficiency Check

Physical examination · MSO NEW ORLEANS · USCG Heartland District (CGD-H) · Activity 1031374

24 July 1987 COI Inspection · Hull Examination

Physical examination · MSO MEMPHIS · USCG Heartland District (CGD-H) · Activity 1330932

4 November 1986 Drydock Extension · Re-Inspection

Physical examination · MSO MEMPHIS · USCG Heartland District (CGD-H) · Activity 1319923

19 November 1985 COI Inspection

Physical examination · MSO MEMPHIS · USCG Heartland District (CGD-H) · Activity 1302544

Deficiency record · 9

Electrical

Issued 27 June 1991 Resolved

INSTALL GROMMET ON ELECTRICAL BOX TO MAKE WATER TIGHT.

Condition: Unknown
Due 27 June 1991
Resolved 27 June 1991

Deck/Cargo

Issued 27 June 1991 Resolved

REPLACE FLAME SCREEN IN DIESEL FUEL TANK GOOSE NECK.

Condition: Unknown
Due 27 June 1991
Resolved 27 June 1991

Engineering

Issued 27 June 1991 Resolved

REPAIR OR REPLACE EXHAUST PIPING ON CARGO PUMP ENGINE.

Condition: Unknown
Due 27 June 1991
Resolved 27 June 1991

Accommodation/Occupational Safety

Issued 10 September 1990 Resolved

POSITION EMERGENCY SHUT DOWN SIGN SO AS TO BE VISIBLE FROM BOTH SIDES OF THE DECK.

Condition: Unknown
Due 10 September 1990
Resolved 10 September 1990

Construction/Loadline

Issued 10 September 1990 Resolved

MAKE EACH OF FOUR (4) HAND WINCH FOOT BRAKES OPERABLE.

Condition: Unknown
Due 10 September 1990
Resolved 10 September 1990

Construction/Loadline

Issued 24 July 1987 Resolved

REPAINT VESSEL DRAFT MARKS. ITEM TO BE COMPLETED PRIOR TO LOADING ANY CARGO AND/OR ASSIGNED COMPLIANCE DATE.

Condition: Unknown
Due 24 July 1987
Resolved 24 July 1987

Construction/Loadline

Issued 24 July 1987 Resolved

MAKE VESSEL UNDER WATER BODY AVAILABLE FOR INSPECTION. ITEM TO BE COMPLETED PRIOR TO LOADING ANY CARGO AND/OR ASSIGNED COMPLIANCE DATE.

Condition: Unknown
Due 24 July 1987
Resolved 24 July 1987

Deck/Cargo

Issued 19 November 1985 Resolved

PROVIDE RECORD OF TEST OF CARGO TRANSFER EQUIPMENT. TO BE COMPLETED TO THE SATISFACTION OF ATTENDING COAST GUARD INSPECTOR PRIOR TO LOADING NEXT CARGOOR COMPLIANCE DATE.

Condition: Unknown
Due 19 November 1985
Resolved 19 November 1985

Deck/Cargo

Issued 19 November 1985 Resolved

TEST CARGO PUMP REMOTE SHUTDOWN IN THE PRESENCE OF A COAST GUARD MARINE INSPECTOR PRIOR TO LOADING NEXT CARGO OR COMPLIANCE DATE.

Condition: Unknown
Due 19 November 1985
Resolved 19 November 1985

Casualty record · 1

25 September 2003Major Marine Casualty · role: Involved in a Marine Casualty · serious marine incident, as classified · activity 1912747

Each line is an incident investigation the Coast Guard recorded with this hull among the vessels involved, with the date and the classification the Coast Guard gave it, and the bridge, lock or dam the investigation names where it names one. Involvement is not fault. The investigation narrative is not published. Source: IIR, through 2026.

Recorded names · 1

BLAKE RIG 20 (2003). Names as the Coast Guard recorded them in incident records, with the years they appear; some are renames and some are spelling variants.

Ownership record

The Coast Guard's documentation record for this hull -- the Abstract of Title, with its owners and liens as filed -- is not in PSIX. Ask, and Maury buys it from the National Vessel Documentation Center, files it here with its date, and every reader of this page gets it.