STS POSEIDON

Offshore Supply Vessel · Offshore class · Built 2000s · USCG Heartland District (CGD-H)

STS POSEIDON is a 2004 offshore supply vessel. The Coast Guard has recorded 26 inspections since 2004, most recently in August 2021, along with 4 deficiencies and 1 casualty investigation in 2011.

Records from 2004 to 2021. Most recent: inspection, 2 August 2021.

Built: 2004
Last inspected: 2 August 2021
Documentation: Not in the documentation file of 10 September 2026
Inspections: 26
Deficiencies: 4 recorded · 0 without a recorded resolution
Controls: None recorded without a removal date
Casualties: 1 investigation · 2011
Inspected with: 1 other vessel
Also recorded as: 1 other name

Identity

US Official No.

1152372

IMO number

8987888 View on MarineTraffic leaves Maury; a third-party site, nothing from it is stored here

Call sign

HP6366

MISLE id

668881

Flag

UNITED STATES

MMSI

366946040, 369808000 (licence lapsed)

Maury page id

psix-668881

Inspections, by type

…physical examinations20

…administrative events1

…with no type recorded5

Years with a record 15 calendar years (2004–2021)

The 26 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 5 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 it406 - Convention (Subpart B), Gross Ton
94 - Regulatory (Subpart C or D), Gross Ton
121 - Convention (Subpart B), Net Ton
64 - 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

WDB7674MMSI 366946040 · cancelled · compulsorily equipped · granted 12 April 2018, cancelled 25 January 2021

WDB7674MMSI 369808000 · cancelled · voluntarily equipped · granted 8 May 2004, cancelled 12 June 2008

FCC Universal Licensing System ship-station file of 6 September 2026, matched to this hull on its US Official Number. Status and dates are the file’s own. The licensee is not read from the file and is not shown. A lapsed licence’s MMSI is still the number the vessel transmitted under while it was valid.

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.

TRITON FREEDOM Industrial Vessel · MISLE 47926 · 4 January 2011 · activity 3922780

Inspection history · 26

2 August 2021 Random ISPS/MTSA/PSC · Deficiency Check · In-Service Inspection

Physical examination · Marine Safety Unit Houma · USCG Heartland District (CGD-H) · Activity 7272620

29 May 2020 Annual Inspection · Administrative Inspection

Physical examination · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 6963352

23 July 2019 MTSA Verification · Annual Inspection · Administrative Inspection

Physical examination · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 6759250

12 March 2019 Administrative Inspection · Drydock Exam · Internal Structural Exam

Physical examination · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 6641086

30 May 2018 Commercial Dive Inspection · Annual Inspection · Administrative Inspection

Physical examination · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 6428801

5 July 2017 Annual Inspection · Administrative Inspection · MTSA Verification

Physical examination · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 6197805

5 June 2016 In-Service Inspection

Physical examination · Marine Safety Unit Houma · USCG Heartland District (CGD-H) · Activity 5898779

5 June 2016 Type not recorded

No type recorded · Marine Safety Unit Houma · USCG Heartland District (CGD-H) · Activity 5909187

17 May 2016 Internal Structural Exam · Administrative Inspection · Hull Examination

Physical examination · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 5879313

11 May 2012 Administrative Inspection · Annual Inspection

Physical examination · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 4308376

4 January 2011 Damage Survey

Physical examination · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 3920589

4 January 2011 Type not recorded

No type recorded · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 3922780

24 March 2010 Administrative Inspection · MTSA Verification · Annual Inspection

Physical examination · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 3703627

26 February 2009 Administrative Inspection · COI Inspection · Hull Examination

Physical examination · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 3424359

21 April 2008 Deficiency Check · Administrative Inspection

Physical examination · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 3189065

3 April 2008 MTSA Verification · Annual Inspection · Administrative Inspection

Physical examination · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 3176643

2 May 2007 Annual Inspection · MTSA Verification · Hull Examination

Physical examination · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 2920358

7 July 2006 MTSA Verification · Re-Inspection

Physical examination · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 2834428

22 June 2006 Type not recorded

No type recorded · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 2688389

8 June 2006 Type not recorded

No type recorded · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 2686296

23 May 2006 Type not recorded

No type recorded · Marine Safety Unit Morgan City · USCG Heartland District (CGD-H) · Activity 2664843

11 August 2005 Re-Inspection

Physical examination · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 2444229

29 June 2005 MTSA Verification

Physical examination · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 2407413

28 June 2005 Deficiency Check

Physical examination · Sector Mobile · USCG Heartland District (CGD-H) · Activity 2406923

19 May 2004 Initial Certification · Cargo Tank Internal · Hull Examination · Plan Review (Other than "T") · Construction Oversight · Internal Structural Exam · Initial Construction-Excluding Oversight · Inclining Experiment

Physical examination · MSO Mobile · USCG Heartland District (CGD-H) · Activity 2055544

22 April 2004 Security Plan Review - ASP

Administrative · Marine Safety Center (MSC) · Activity 2050289

Deficiency record · 4

01 - Certificates & Documentation › 012 - Crew Certificates › Certificates for master and officers

Issued 2 August 2021 Resolved

01201: Subject to the provisions of regulation I/10, paragraph 5, any certificate required by the Convention must be kept available in its original form on board the ship on which the holder is serving. Master did not have original flag state endorsement on board the vessel. STCW I/2.11

Condition: Placed in Improper Service
Action required: 17 - Rectify deficiencies prior to departure
Resolved 5 August 2021
Resolution: Agent provided letter from Flag attesting to valid endorsement and one time voyage waiver to panama where original document will be received.

13 - Propulsion and Auxiliary Machinery › N/A - No Subsystem › Operation of machinery

Issued 23 July 2019 Resolved

Vessel controls would not synch on command at operation station so vessel could conduct propulsion test. 46CFR58.05-5

Action required: 50 - Rectify deficiencies w/in 30 days
Due 14 August 2019
Resolved 25 July 2019
Resolution: Throttles in bridge were fix and now propulsion is working.

Pollution Prevention/Response › Prevention Equipment › Oily Residue (sludge/slop) Tank

Issued 5 June 2016 Resolved

VSL was written a CG-835 to pump out overfilled dirty oil tanks prior to getting u/w because a pollution incident that had already occured.

Due 5 June 2016
Resolved 6 June 2016
Resolution: Receipt was emailed showing that tanks were pumped out by ESH.

Lifesaving › Launching Appliances › Davit

Issued 19 May 2004 Resolved

Provide onboard a rescue boat davit approved under approval series 46 CFR 160.132 with a winch approved under approval series 46 CFR 160.115 as required by 46 CFR 133.135(b) and 46 CFR 133.160(a). Prove proper installation, testing and embarkation, launching, and recovery arrangements.

Action required: 705 - Other - as specified
Due 19 July 2004
Resolved 28 June 2005
Resolution: Accepted by G-MOC-2, letter ser num 16703/46CFR125.170, dated 22 June 2005. A copy of the letter is included in the vessels document file and a special note was entered in the vessel file concerning any future replacement.

Casualty record · 1

4 January 2011Routine · role: Involved in a Marine Casualty · activity 3922780

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

OCEAN INSPECTOR (2011). 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.