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SEDCO 601

Mobile Offshore Drilling Unit · Offshore class · Built 1980s · USCG Heartland District (CGD-H)

SEDCO 601 is a 1983 mobile offshore drilling unit. The Coast Guard has recorded 12 inspections since 1985, most recently in May 1991, along with 49 deficiencies.

Records from 1985 to 1991. Most recent: inspection, 31 May 1991.

Built
1983
Last inspected
31 May 1991
Documentation
Not in the documentation file of 10 September 2026
Inspections
12
Deficiencies
49 recorded · 0 without a recorded resolution
Controls
None recorded without a removal date

Identity

US Official No.
654955
IMO number
—
Call sign
WDVB
MISLE id
55177
Flag
UNITED STATES
MMSI
—
Maury page id
psix-55177

Inspections, by type

…physical examinations6
…administrative events1
…with no type recorded5
Years with a record 7 calendar years (1985–1991)
The 12 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 35 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 it4836 - Regulatory (Subpart C or D), Gross Ton
4836 - Regulatory (Subpart C or D), Net Ton
0 - Dead Weight, 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

WDVBMMSI not assigned · expired · voluntarily equipped · granted 17 January 1985, cancelled 17 January 1990
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.

A report is not offered for this hull: Its record holds only 2 of the seven kinds of material a report is built from: inspections, deficiencies, operational controls, tow-unit appearances, casualty records, dimensions and documentation. That is a statement about the record, not about the vessel. Reports.

Inspection history · 12

31 May 1991 Administrative
Administrative · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 910696
31 January 1990 Type not recorded
No type recorded · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 1232811
9 January 1990 Type not recorded
No type recorded · MSO PORT ARTHUR · USCG Heartland District (CGD-H) · Activity 1225432
20 September 1989 Type not recorded
No type recorded · MSO PORT ARTHUR · USCG Heartland District (CGD-H) · Activity 891207
31 July 1989 Deficiency Check
Physical examination · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 1200502
20 June 1989 COI Inspection
Physical examination · MSO MORGAN CITY · USCG Heartland District (CGD-H) · Activity 1197834
16 July 1988 Deficiency Check
Physical examination · MSO PORT ARTHUR · USCG Heartland District (CGD-H) · Activity 1030934
7 July 1988 Hull Examination · Re-Inspection
Physical examination · MSU GALVESTON · USCG Heartland District (CGD-H) · Activity 1342778
26 June 1987 Drydock Extension · COI Inspection
Physical examination · MSU GALVESTON · USCG Heartland District (CGD-H) · Activity 1020480
26 February 1986 Re-Inspection · Deficiency Check · MARPOL Annex I Examination
Physical examination · MSU GALVESTON · USCG Heartland District (CGD-H) · Activity 999538
23 July 1985 Type not recorded
No type recorded · MSU GALVESTON · USCG Heartland District (CGD-H) · Activity 1286171
10 April 1985 Type not recorded
No type recorded · MSO PORT ARTHUR · USCG Heartland District (CGD-H) · Activity 1289016

Deficiency record · 49

Accommodation/Occupational Safety
Issued 31 January 1990 Resolved
MAKE ALL RECEIVERS, BULK TANKS AND HPV AVAILABLE FOR INTERNAL EXAM BY A U.S. COAST GUARD MARINE INSPECTION. REQUIREMENT WAS TO BE COMPLIED BY 30SEP89 DURING INSPECTION MI89017235 DATED 20JUN89/
Condition: Unknown
Due 1 February 1990
Resolved 18 May 2002
Resolution: MISLE Maintenance - Resolved all open deficiencies issued prior to 6/1/1997 where activity was closed and deficiency due date was past
Navigation
Issued 20 September 1989 Resolved
REPAIR PORT AND STARBOARD AFT DRAFT SENSORS.
Condition: Unknown
Due 20 September 1989
Resolved 20 September 1989
Electrical
Issued 20 June 1989 Resolved
INSTALL PURGE FAILURE, LOSS ALARM ON BOP INDICATING PANEL AT DRILLERS STATION (NFPA 496).
Condition: Unknown
Due 20 June 1989
Resolved 20 June 1989
Documentation
Issued 20 June 1989 Resolved
PROVIDE A COAST GUARD APPROVED CONSTRUCTION PORTFOLIO IAW 46CFR 107.305 (HH) NOTE: A EXTENSION ON THIS ITEM WILL BE GRANTED ONCE SUBMITTAL HAS ACCURED.
Condition: Unknown
Due 20 June 1989
Resolved 20 June 1989
Documentation
Issued 20 June 1989 Resolved
PROVIDE A COAST GUARD APPROVED HAZARDOUS LOCATION PLAN IAW 46CFR 110.25(I).
Condition: Unknown
Due 20 June 1989
Resolved 20 June 1989
Electrical
Issued 20 June 1989 Resolved
SHOW APPROVAL FOR THE NICKEL CAD BATTERYS USED FOR THE GENERAL ALARM SYSTEM46CFR 11.15
Condition: Unknown
Due 20 June 1989
Resolved 20 June 1989
Documentation
Issued 20 June 1989 Resolved
CONDUCT TESTS AND LOG SAME IAW 46CFR 109.211
Condition: Unknown
Due 20 June 1989
Resolved 20 June 1989
Electrical
Issued 20 June 1989 Resolved
INSTALL PURGE FAILURE, LOSS ALARM ON SUBSEA MONITOR AT DRILLERS STATION (NFPA 496).
Condition: Unknown
Due 20 June 1989
Resolved 20 June 1989
Electrical
Issued 20 June 1989 Resolved
REPAIR THE PURGE SYSTEM AND THE PURGE FAILURE, LOSS ALARM ON THE CEMENT BARGE CONTROL PANEL. (NFPA 496)
Condition: Unknown
Due 20 June 1989
Resolved 20 June 1989
Construction/Loadline
Issued 20 June 1989 Resolved
UNPLUG SOUNDING TUBES SB6, SB8, PB4, AND PB5.
Condition: Unknown
Due 20 June 1989
Resolved 20 June 1989
Accommodation/Occupational Safety
Issued 20 June 1989 Resolved
MAKE ALL AIR RECIEVERS BULK TANK AND HPV RELIEF VALVES AVAILABLE FOR PRESSURE TESTING IN THE PRESENCE OF A U.S COAST GUARD MARINE INSPECTOR.
Condition: Unknown
Due 20 June 1989
Resolved 20 June 1989
Electrical
Issued 20 June 1989 Resolved
TEST THE AC GENERATOR REVERSE POWER RELAYS IN THE PRESENCE OF A U.S COAST GUARD MARINE INSPECTOR.
Condition: Unknown
Due 20 June 1989
Resolved 20 June 1989
Electrical
Issued 20 June 1989 Resolved
TEST THE LOW LUBE OIL PRESSURE OVERSPEED SHUTDOWN AND HIGH WATER TEMP. ALARMS ON #1,#2,#3 AND #4 GENERATORS IN THE PRESENCE OF A U.S COAST GUARD MARINE INSPECTOR.
Condition: Unknown
Due 20 June 1989
Resolved 20 June 1989
Electrical
Issued 20 June 1989 Resolved
CHANGE ARTIFICIAL ISLAND LIGHTS TO SHOW A QUICK FLASH CHARACTERISTICS 60 FLASHES/MINUTE 33CFR PART 67
Condition: Unknown
Due 20 June 1989
Resolved 20 June 1989
Electrical
Issued 20 June 1989 Resolved
CHANGE FOG HORN CHARACTERISTICS TO A 2 SECOND BLAST EVERY 20 SECONDS 33CFR PART 67
Condition: Unknown
Due 20 June 1989
Resolved 20 June 1989
Electrical
Issued 20 June 1989 Resolved
RENEW PLASTIC TIE WRAPS IN THE ENGINE ROOM ON THE ELECTRICAL CABLES.
Condition: Unknown
Due 20 June 1989
Resolved 20 June 1989
Electrical
Issued 20 June 1989 Resolved
REPLACE THE 1/4" STAINLESS STEEL THE WRAPS WITH 5/8" STAINLESS STEEL THE WRAPS IN ENGINEERING SPACES.
Condition: Unknown
Due 20 June 1989
Resolved 20 June 1989
Fire Fighting
Issued 20 June 1989 Resolved
REMOVE THE FLAT SPOTS, KINKS AND TWIST IN THE HALON SYSTEM IN THE HALON ROOM.
Condition: Unknown
Due 20 June 1989
Resolved 20 June 1989
Accommodation/Occupational Safety
Issued 20 June 1989 Resolved
MAKE ALL AIR RECIEVERS BULK TANKS AND HPV'S AVAILABLE FOR INTERNAL EXAM BY A U.S COAST GUARD MARINE INSPECTOR.
Condition: Unknown
Due 20 June 1989
Resolved 20 June 1989
Construction/Loadline
Issued 20 June 1989 Resolved
REPAIR PORT AND STARBOARD AFT DRAFT SENSORS.
Condition: Unknown
Due 20 June 1989
Resolved 20 June 1989
Construction/Loadline
Issued 20 June 1989 Resolved
CALIBRATE REMOTE SOUNDINGS TUBE INDICATORS FOR SB1, SB3 AND SB5.
Condition: Unknown
Due 20 June 1989
Resolved 20 June 1989
Electrical
Issued 20 June 1989 Resolved
RENEW EMERGENCY SHUTDOWN BOXES ON THE INBOARD SIDE OF STARBOARD AFT COLUMN HOUSE.
Condition: Unknown
Due 20 June 1989
Resolved 20 June 1989
Electrical
Issued 20 June 1989 Resolved
INSTALL CAPS ON WELDING LEAD PLUGS ON OUTBOARD SIDE OF STARBOARD AFT COLUMNHOUSE.
Condition: Unknown
Due 20 June 1989
Resolved 20 June 1989
Electrical
Issued 7 July 1988 Resolved
TELEPHONE AT MUD PIT.
Condition: Unknown
Due 7 July 1988
Resolved 7 July 1988
Lifesaving
Issued 7 July 1988 Resolved
LAUNCH AND OPERATE BOTH LIFEBOATS IN THE WATER. TEST RELEASING GEAR & SPRAYSYSTEM.
Condition: Unknown
Due 7 July 1988
Resolved 7 July 1988
Electrical
Issued 7 July 1988 Resolved
EXTENSION PLUG (PORT FORWARD) DRILL FLOOR.
Condition: Unknown
Due 7 July 1988
Resolved 7 July 1988
Electrical
Issued 7 July 1988 Resolved
PROVIDE EXPLOSION PROOF ELECTRICAL EQUIPMENT LISTED BY AN INDEPENDENT TESTING LABORATORY FOR THE FOLLOWING;
Condition: Unknown
Due 7 July 1988
Resolved 7 July 1988
Electrical
Issued 7 July 1988 Resolved
PUBLIC ADDRESS SPEAKER (2) & MUD PIT.
Condition: Unknown
Due 7 July 1988
Resolved 7 July 1988
Lifesaving
Issued 26 June 1987 Resolved
REPAIR GENERAL ALARM BELLS IN ENGINE ROOM, 2ND DECK HALL, PORT AFT LEG, ANDWELDING SHOP ALARM LIGHT
Condition: Unknown
Due 26 June 1987
Resolved 26 June 1987
Unknown
Issued 26 June 1987 Resolved
CONDUCT INSPECTION OF DRILLING AND ANCILLARY EQUIPMENT
Condition: Unknown
Due 26 June 1987
Resolved 26 June 1987
Fire Fighting
Issued 26 June 1987 Resolved
CONDUCT FIRE DRILL
Condition: Unknown
Due 26 June 1987
Resolved 26 June 1987
Lifesaving
Issued 26 June 1987 Resolved
CONDUCT BOAT DRILL
Condition: Unknown
Due 26 June 1987
Resolved 26 June 1987
Unknown
Issued 26 June 1987 Resolved
CONDUCT INSPECTION OF CLASSIFIED LOCATIONS
Condition: Unknown
Due 26 June 1987
Resolved 26 June 1987
Deck/Cargo
Issued 26 June 1987 Resolved
INSPECT MOORING GEAR
Condition: Unknown
Due 26 June 1987
Resolved 26 June 1987
Electrical
Issued 26 June 1987 Resolved
CONDUCT TEST OF GENERATOR OVERSPEED, REVERSE CURRENT, LOWOIL ALARMS
Condition: Unknown
Due 26 June 1987
Resolved 26 June 1987
Fire Fighting
Issued 26 June 1987 Resolved
TEST VENTILATORS AND SHUT DOWNS
Condition: Unknown
Due 26 June 1987
Resolved 26 June 1987
Documentation
Issued 26 June 1987 Resolved
PROVIDE COAST GUARD APPROVED OPERATIONS MANUAL
Condition: Unknown
Due 26 June 1987
Resolved 26 June 1987
Deck/Cargo
Issued 26 June 1987 Resolved
PROVIDE FORKLIFT INSPECTION DATA
Condition: Unknown
Due 26 June 1987
Resolved 26 June 1987
Fire Fighting
Issued 26 June 1987 Resolved
TEST FIRE DETECTION SYSTEM
Condition: Unknown
Due 26 June 1987
Resolved 26 June 1987
Fire Fighting
Issued 26 June 1987 Resolved
OPERATE FIXED FOAM SYSTEM AND PROVIDE FOAM SAMPLE ANALYSIS
Condition: Unknown
Due 26 June 1987
Resolved 26 June 1987
Construction/Loadline
Issued 26 June 1987 Resolved
CONDUCT INSPECTION OF HULL STRUCTURE AND SPACES
Condition: Unknown
Due 26 June 1987
Resolved 26 June 1987
Deck/Cargo
Issued 26 June 1987 Resolved
PROVIDE CRANE INSPECTION DATA
Condition: Unknown
Due 26 June 1987
Resolved 26 June 1987
Lifesaving
Issued 26 February 1986 Resolved
INSTALL SPACER BAR ON SMOKE FLOAT #2.
Condition: Unknown
Due 26 February 1986
Resolved 26 February 1986
Fire Fighting
Issued 26 February 1986 Resolved
PROPERLY EQUIP BOTH EMERGENCY LOCKERS AND CHARGE AIR BOTTLES.
Condition: Unknown
Due 26 February 1986
Resolved 26 February 1986
Fire Fighting
Issued 26 February 1986 Resolved
CONDUCT FIRE AND BOAT DRILLS, TEST GENERAL ALARM PRIOR TO SAILING.
Condition: Unknown
Due 26 February 1986
Resolved 26 February 1986
Lifesaving
Issued 26 February 1986 Resolved
PROVIDE THE FOLLOWING FOR BOAT #2: STENCIL LIFEJACKETS, REPAIR WATER SPRAY,REPLACE AIR PRESSURE GAUGE, REPAIR WATER SPRAY PIPING, REPAIR ENGINE START HYDRAULIC SYSTEM.
Condition: Unknown
Due 26 February 1986
Resolved 26 February 1986
Fire Fighting
Issued 26 February 1986 Resolved
HAVE HALON SYSTEM PROFESSIONALLY SERVICED.
Condition: Unknown
Due 26 February 1986
Resolved 26 February 1986
Fire Fighting
Issued 10 April 1985 Resolved
UPDATE THE FIRE CONTROL PLAN AND RESUBMIT TO U. S. COAST GUARD MARINE SAFETY OFFICE, PORT ARTHUR, TEXAS FOR APPROVAL.
Condition: Unknown
Due 10 April 1985
Resolved 10 April 1985
Lifesaving
Issued 10 April 1985 Resolved
INSTALL A ROTATING RED LIGHT IN THE ENGINE ROOM FOR THE GENERAL ALARM THAT IS VISIBLE THROUGHOUT THE SPACE.
Condition: Unknown
Due 10 April 1985
Resolved 10 April 1985

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.