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HERCULES 257

Mobile Offshore Drilling Unit · Offshore class · Built 1970s · USCG Heartland District (CGD-H)

HERCULES 257 is a 1979 mobile offshore drilling unit. The Coast Guard has recorded 33 inspections since 2001, most recently in January 2010, along with 15 deficiencies.

Records from 2001 to 2010. Most recent: inspection, 1 January 2010.

Built
1979
Last inspected
1 January 2010
Documentation
Not in the documentation file of 10 September 2026
Inspections
33
Deficiencies
15 recorded · 0 without a recorded resolution
Controls
None recorded without a removal date
Inspected with
1 other vessel

Identity

US Official No.
—
IMO number
8752647 View on MarineTraffic leaves Maury; a third-party site, nothing from it is stored here
Call sign
A8NY5
MISLE id
37419
Flag
LIBERIA
MMSI
—
Maury page id
psix-37419

Inspections, by type

…administrative events17
…with no type recorded11
Years with a record 9 calendar years (2001–2010)
The 33 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 16 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 it4917 - Convention (Subpart B), Gross Ton
4917 - Convention (Subpart B), 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.

Inspected as a tow unit · 1

The Coast Guard recorded this vessel and the following in the same inspection activity — normally a tug and the barges in its tow. A recreational or unclassed hull in the same activity is held and not published, so it does not appear here: these lists are a floor, not a complete manifest.

DUKE Offshore Supply Vessel · MISLE 39059 · 5 November 2003 · activity 2027644

Inspection history · 33

1 January 2010 Type not recorded
No type recorded · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 3894216
16 October 2008 COC-MODU Renew
Type not classified · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 3345892
18 June 2008 Type not recorded
No type recorded · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 3240500
29 February 2008 Administrative Inspection
Administrative · Marine Safety Unit Port Arthur · USCG Heartland District (CGD-H) · Activity 3155810
3 October 2007 COC-MODU Annual
Type not classified · Marine Safety Unit Port Arthur · USCG Heartland District (CGD-H) · Activity 3072294
26 June 2007 Administrative Inspection
Administrative · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 2974781
12 June 2007 Type not recorded
No type recorded · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 2985502
12 October 2006 COC-MODU Renew
Type not classified · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 2799224
24 January 2006 COC-MODU Annual
Type not classified · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 2572240
28 October 2005 Administrative Inspection
Administrative · Sector Mobile · USCG Heartland District (CGD-H) · Activity 2524239
28 October 2005 Plan Review (Other than "T")
Administrative · Sector Mobile · USCG Heartland District (CGD-H) · Activity 2524249
7 October 2004 COC-MODU Renew
Type not classified · MSO PORT ARTHUR · USCG Heartland District (CGD-H) · Activity 2213252
25 June 2004 Type not recorded
No type recorded · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 2110410
19 May 2004 Type not recorded
No type recorded · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 2108517
29 January 2004 Type not recorded
No type recorded · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 2021233
5 November 2003 Type not recorded
No type recorded · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 2027644
28 October 2003 Type not recorded
No type recorded · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 1937833
17 October 2003 Type not recorded
No type recorded · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 1937808
1 October 2003 Certificate of Compliance
Administrative · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 1918720
5 September 2003 Type not recorded
No type recorded · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 1908090
11 August 2003 Type not recorded
No type recorded · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 1917447
2 June 2003 Administrative Inspection
Administrative · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 1807811
20 March 2003 Administrative Inspection
Administrative · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 1760138
26 January 2003 Administrative Inspection
Administrative · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 1735478
26 January 2003 Administrative Inspection
Administrative · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 1735567
8 January 2003 Administrative Inspection
Administrative · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 1727716
11 October 2002 Certificate of Compliance
Administrative · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 1716816
15 July 2002 Administrative Inspection
Administrative · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 1646744
20 April 2002 Administrative Inspection
Administrative · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 1607031
26 January 2002 Administrative Inspection
Administrative · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 1481583
2 December 2001 Administrative
Administrative · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 1076889
1 December 2001 Administrative
Administrative · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 1076873
12 October 2001 Letter of Compliance (Initial/Renewal)
Administrative · MSU GALVESTON · USCG Heartland District (CGD-H) · Activity 1379619

Deficiency record · 15

Accommodation/Occupational Safety › Potable Water System › General
Issued 24 January 2006 Resolved
Dishwasher / Sanitizer was inoperative, dishes were being hand washed using bleach solution, replacement was put on order.
Due 7 February 2006
Resolved 27 January 2006
Resolution: Unit was replaced.
Fire Fighting › Portable CO2 Fire Extinguisher › Marking
Issued 7 October 2004 Resolved
Mark fire extinguishers to match the stowage location
Condition: Improper Installation
Action required: 705 - Other - as specified
Due 31 December 2004
Resolved 23 January 2006
Resolution: Verified that the extinguishers did match the locations.
Stability › Watertight Integrity › General
Issued 7 October 2004 Resolved
Repair hatch cover in port sack room to provide proper seal.
Condition: Unknown
Action required: 705 - Other - as specified
Due 31 December 2004
Resolved 23 January 2006
Resolution: Verified that the hatch cover sealed properly.
Fire Fighting › Ventilation Systems › Duct Hatches
Issued 7 October 2004 Resolved
Replace missing gasket material on main deck vents.
Condition: Unknown
Action required: 705 - Other - as specified
Due 31 December 2004
Resolved 23 January 2006
Resolution: Verified that the gasket material had been replaced
Engineering › Bilge Water Management System
Issued 30 September 2003 Resolved
BILGE HIGH LEVEL ALARM FLOAT LOCATED IN THE PUMP ROOM IS STUCK IN THE HIGH WATER ALARM MODE. LEGACY COMPONENT DESC: Interface Detector
Condition: Unknown
Due 30 October 2003
Resolved 1 October 2003
Fire Fighting › Miscellaneous Items
Issued 30 September 2003 Resolved
AIR PURGE ALARM NOT WORKING ON DRILLING CONSOLE. LEGACY COMPONENT DESC: Insulation (Penetration of Oil/Oil Vapors)
Condition: Unknown
Due 30 October 2003
Resolved 24 October 2003
Lifesaving › Lifeboat Equipment
Issued 11 October 2002 Resolved
Lifeboat inventories are lacking several items listed on worklis. Replace/renew listed items.
Condition: Unknown
Due 11 November 2002
Resolved 15 October 2002
Resolution: Required items added to both life boats.
Electrical › Electrical Distribution System (service) › Metallic Enclosure/Frame
Issued 11 October 2002 Resolved
Electrical panel missing panel faces in breaker boxes in E-Gen space and storeroom.
Condition: Improper/Lack of Maintenance
Due 11 November 2002
Resolved 15 October 2002
Resolution: Electrical panel faces have been provided.
Engineering › Fuel Oil Service System › Piping
Issued 11 October 2002 Resolved
Provide repairs to fuel leaks on fuel tanks and hoses/piping in engine room. Remove fuel from bilge, ensure overflow fuel from fop is contained in proper container. Ensure proper filters are installed on engines. Remove locking devices from refuel hoses and provide certified fuel hose use.
Condition: Unknown
Due 11 November 2002
Resolved 15 October 2002
Resolution: Fuel leaks repaired, filters installed, containment installed, locking devices removed, certified hose installed.
Deck/Cargo › Marine Portable Tanks › Pipe Connection
Issued 11 October 2002 Resolved
Ensure potable water and sanitary water systems are not cross connected.
Condition: Improper Installation
Due 11 November 2002
Resolved 15 October 2002
Resolution: Cross connection removed.
Engineering › Pressure Vessel
Issued 11 October 2002 Resolved
Provide proof of internal exam of pressure vessels to the satisfaction of flag state represenative.
Condition: Unknown
Due 11 November 2002
Resolved 15 October 2002
Resolution: ABS survey report reflecting NDT testing of pressure vessels.
Documentation › Certificates/Documents › MODU Safety Certificate
Issued 11 October 2002 Resolved
Provide copy of full term MODU code.
Condition: Unknown
Due 11 November 2002
Resolved 15 October 2002
Resolution: Ocean Engineering completing any outstandings that exist with ABS.
Documentation
Issued 12 October 2001 Resolved
Provide approved Operations Manual onboard.
Condition: Unknown
Due 12 November 2001
Resolved 30 September 2003
Resolution: Approved operation manual provided on board.
Documentation
Issued 12 October 2001 Resolved
Provide approved hazardous location and fire control plan onboard.
Condition: Unknown
Due 12 November 2001
Resolved 30 September 2003
Resolution: Approved fire control plan on board.
Documentation
Issued 12 October 2001 Resolved
Prior to refueling, provide fuel oil transfer procedures onboard.
Condition: Unknown
Due 12 November 2001
Resolved 6 November 2001

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.