OCSNCOE Unit Emblem (silhouettes of a self-elevating MODU, an OSV and an offshore wind turbine over a silhouette of the United States with the U.S. Coast Guard mark (i.e., racing stripe) in the background).Outer Continental Shelf National Center of Expertise (OCSNCOE)

JACK ST. MALO during offshore construction with attending OSV and Floatel VICTORY. C-ENFORCER underway with water cannons flowing. SEVAN LOUISIANA underway when initially entering the U.S. Gulf of Mexico. Platform GINA off the California coast. Block Island windfarm with attending CTV. SPARTAN 151 dockside in Seward, AK.

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Policy and Guidance - Mobile Offshore Drilling Unit (MODU)

Note: Page tabs may appear collapsed or as a menu near the top of the page on mobile devices or lower screen resolutions.

The content listed below is available on this page. Use the tabs above to view the following categories:

  1) COMDTINST 16000.76, Marine Safety: OCS Inspections (previously MSM Volume II, Section G);

  2) Overview of U.S. and Foreign-Flagged inspection/examination requirements (i.e., exam options);

  3) Code of Federal Regulations (CFRs);

  4) National Policy;

  5) District Eight (Gulf of Mexico) Policy;

  6) Navigation and Vessel Inspection Circulars (NVICs);

  7) USCG Mission Management System (MMS) Work Instructions (WIs);

  8) Marine Safety Information Bulletins (MSIBs);

  9) MODU Codes (electronic versions assembled and provided by the OCSNCOE and IMO resolutions that created and amends each of the Codes);

  10) MODU Applicability Flowchart; and

  11) Inspection/examination job aids (replaced CG-840 books).


 

COMDTINST 16000.76, Marine Safety: OCS Inspections (previously Section G of the Marine Safety Manual, Volume II)

 

The following chapters of COMDTINST 16000.76, Marine Safety: Outer Continental Shelf Inspections are applicable to MODUs:

  • Chapter 1, Regulations, Policy and Guidance for a Unit Conducting an OCS Activity,
  • Chapter 2, Procedures Applicable to U.S. MODUs, and
  • Chapter 3, Procedures Applicable to Foreign MODUs.

This Commandant Instruction replaced Marine Safety Manual (MSM), Volume II: Section G - OCS Activities (cancelled 20Sep2021 and listed here for historical reference only). Note that there was no content change with the republishing of MSM Vol II Section G as a separate Commandant Instruction on 20Sep2021, but future content revisions are planned.


 

Overview of U.S. and Foreign Flagged inspection/examination requirements

U.S. Flagged MODUs are inspected to applicable portions of 33 CFR Subchapter N (Outer Continental Shelf Activities) and 46 CFR Subchapters I-A (Mobile Offshore Drilling Units), F (Marine Engineering), J (Electrical Engineering) & S (Subdivision and Stability). Note that additional portions of 33 CFR relating to Navigation and Pollution and 46 CFR relating to licensing/manning, lifesaving/firefighting type approvals and dangerous cargoes also apply.

Foreign-Flagged MODUs engaged in OCS activities must comply with one-of-three 'options' for "Design and Equipment" (see 33 CFR 143.207(a), (b) and (c)) AND one-of-three 'options' for "Operations" (see 33 CFR 146.205(a), (b) and (c)). Additional details related to these examination options and applicable regulatory cites are available by clicking on the following links (opens a pdf in a separate window):

  ○  Option A MODUs - examined to specific parts of the U.S. MODU regulations

  ○  Option B MODUs - PANAMA (Flag State equivalency)

  ○  Option B MODUs - MARSHALL ISLANDS (Flag State equivalency)

  ○  Option C MODUs - examined to the MODU Code, 1979

  ○  Option C MODUs - examined to the 1989 & 2009 MODU Codes (note that 33 CFR 143.207(c) and §146.205(c) both reference the Code for Construction and Equipment of Mobile Offshore Drilling Units (1979 MODU Code), but the 1989 and 2009 MODU Codes have been accepted as equivalencies under this examination option)


 

Code of Federal Regulations (CFRs)

CFRs that pertain to MODUs are as follows:

Primary subchapters -
  ○  33 CFR Subchapter N - Outer Continental Shelf Activities
  ○  46 CFR Subchapter I-A  - Mobile Offshore Drilling Units

Additional subchapters that apply (not all will apply to each of the MODUs inspected or examined under the subchapters listed above) -
  ○  46 CFR Subchapter A - Procedures Applicable to the Public
  ○  46 CFR Subchapter B - Merchant Marine Officers and Seamen
  ○  46 CFR Subchapter E - Load Lines
  ○  46 CFR Subchapter F - Marine Engineering
  ○  46 CFR Subchapter G - Documentation and Measurement of Vessels
  ○  46 CFR Subchapter J - Electrical Engineering
  ○  46 CFR Subchapter Q - Equipment, Construction and Materials: Specifications and Approval
  ○  46 CFR Subchapter S - Subdivision and Stability

Note that 46 CFR Subchapters N, O, or V, or portions thereof, may also be utilized for vessels with specific arrangements/equipment or involved in specific operations.

  ○  33 CFR Subchapter D - International Navigation Rules
  ○  33 CFR Subchapter E - Inland Navigation Rules
  ○  33 CFR Subchapter F - Vessel Operating Regulations
  ○  33 CFR Subchapter H - Maritime Security (Parts 101, 103 and 104)
  ○  33 CFR Subchapter O - Pollution
  ○  33 CFR Subchapter P - Ports and Waterways Safety

Also note that 33 CFR Subchapter A also has applicability in regards to administration and legal actions.

CFRs can be viewed at ecfr.gov (regularly updated online version) or govinfo.gov (annual editions).


 

National Policy

National policy letters that apply to MODUs are listed in the table below, grouped by issuing authority and ordered from newest to oldest (by policy number/original issue date). Click on the policy number to open the document (opens in a new window).

Office Policy Number Date Issued Subject
Office of Commercial Vessel Compliance (CG-CVC; formerly CG-543, G-3PCV, G-PCV, and G-MOC)
CG-CVC 18-04 03Apr2018 Guidance on Implementation of New Standards for Fire Protection, Detection and Extinguishing Equipment
CG-CVC 17-09 27Nov2017 Issuance and Acceptance of Electronic Certificates
CG-CVC Change Notice 30Jul2014 Policy Cancellations – COMDTCHANGENOTE 16000, CH-1 to MSM Vol III
CG-CVC Change Notice 24Jun2014 Policy Cancellations – COMDTCHANGENOTE 16000, CH-1 to MSM Vol II
CG-CVC 13-02 05May2013 MARPOL Annex VI International Energy Efficiency (IEE) Certificate Implementation Guidance
CG-CVC 13-01 26Feb2013 Interim Guidance for Revised MARPOL Annex V Implementation
CG-CVC 12-08 15Oct2012 Guidance Implementing the International Convention on the Control of Harmful Anti-Fouling Systems on Ships
(CANCELLED, see 25Jun14 Change Notice to MSM Vol II (linked in this table); policy is included here for historical reference purposes only)
CG-CVC 12-05 11Oct2012 Hours of Rest – Implementation of the 2010 Amendments to the International Convention on Standards of Training, Certification and Watchkeeping for Seafarers, 1978 
(SUPERSEDED, see 30Jul2014 Change Notice to MSM Vol III (linked in this table); policy is included here for historical reference purposes only)
CG-CVC 12-04 25Jul2012 Guidelines for Compliance and Enforcement of the Emission Control Areas Established within the United States Jurisdiction as Designated in MARPOL Annex VI Regulation 14 
(CANCELLED by 
CVC-WI-022(1) dated 13Jan2020; policy is included here for historical reference purposes only)
CG-543 11-06 08Jun2011 Risk-Based Targeting of Foreign Flagged Mobile Offshore Drilling Units (MODUs)
(CANCELLED, see 25Jun14 Change Notice to MSM Vol II (linked in this table); policy is included here for historical reference purposes only)
CG-543 11-04 13Apr2011 Compliance Verification of Alternative Security Program for MTSA Regulated Vessels and Facilities
CG-543 11-01 11Feb2011 Guidelines for Coast Guard Evaluations of Compliance with the U.S. Environmental Protection Agency’s (EPA) Vessel General Permit (VGP) for Discharges Incidental to the Normal Operation of Vessels
CG-543 10-05 26Nov2010 Electronic Navigation Publications onboard U.S. Vessels
CG-543 10-01 04Mar2010 Use of Single Voyage Load Line Authorizations
CG-543 09-02 12Aug2009 Industry Guidelines for Requesting Alternate Planning Criteria Approval, One Time Waivers and Interim Operating Authorization
CG-543 09-01 04Feb2009 Guidelines for Ensuring Compliance with Annex VI to the International Convention for the Prevention of Pollution from Ships (MARPOL) 73/78; Prevention of Air Pollution from Ships (CVC-WI-022(1) applies to Annex VI Regulation 14; the Work Instruction takes precedence if it conflicts with Policy Letter 09-01)
CG-3PCV 06-09 22Dec2009 Implementation of the International Convention for the Prevention of Pollution from Ships (MARPOL) 73/78; Annex I Revised
G-MOC 05-02 03May2005 Guidelines for Interim Voluntary Implementation of Annex VI to the International Convention for the Prevention of Pollution from Ships (MARPOL) 73/78; Prevention of Air Pollution from Ships
G-MOC 04-13,
Rev-1
24Mar2005 Guidelines for the Inspection of Oily Water Monitor and Separator Systems
G-MOC 04-12 23Dec2004 Issuing International Ship Security Certificates (ISSC) to Vessels not Subject to SOLAS
G-MOC 04-06 10Aug2004 Guidance for Ballast Water Regulations
G-MOC 04-05 29Mar2004 Guidance when Considering Exemptions from the SOLAS Requirement to Carry Voyage Data Recorders (VDR)
G-MOC 04-02 17May2004 Global Maritime Distress and Safety System (GMDSS) Operator Requirements
G-MOC 03-03 08Sep2003 Guidelines for Equivalent Compliance with (Revised) MARPOL 73/78 Annex IV (Sewage)
G-MOC 02-03 12Jul2002 Policy for the Enforcement of the 1995 Amendments to the International Convention on Standards of Training, Certification and Watchkeeping for Seafarers, 1978 (STCW 95) on board U.S. Flag Vessels 
(SUPERSEDED, see 30Jul2014 Change Notice to MSM Vol III (linked in this table); policy is included here for historical reference purposes only)
G-MOC 02-01 08Feb2002 Regular Compliment Crew Determinations for Vessels Engaged in OCS Activities
(CANCELLED, see 25Jun14 Change Notice to MSM Vol II (linked in this table); policy is included here for historical reference purposes only)
G-MOC 01-03 18Oct2001 Pressure Vessel Internal Examination and Relief Valve Testing for Foreign Flag MODUs Operating on the Outer Continental Shelf (OCS)
(CANCELLED, see 25Jun14 Change Notice to MSM Vol II (linked in this table); policy is included here for historical reference purposes only)
G-MOC 01-01 13Apr2001 Cargo Ship Fixed Fire-Extinguishing System SOLAS Exemptions
G-MOC 1-99 15Dec1998 Guidance on Port State Control ISM Code Enforcement
Office of Design and Engineering Standards (CG-ENG; formerly CG-521, G-3PSE, G-PSE, and G-MSE)
CG-ENG 02-23 02Aug2023 USCG Acceptance of IMO Guidelines for Hydrostatic Testing of Carbon Dioxide (CO2) Cylinders Associated with Fixed Gas Fire Extinguishing Systems
The referenced IMO guidelines are found in MSC.1/Circ.1318/Rev.1: Revised Guidelines for the Maintenance and Inspections of Fixed Carbon Dioxide Fire-Extinguishing Systems (click on name to access).
CG-ENG 01-23 17Mar2023 Design Basis Agreement Submission Guidance
CG-ENG 03-21 02Aug2021 Acceptance of Helicopter Safety Advisory Committee (HSAC) Recommended Practice (RP) 161, New Build Helideck Design Guidelines
CG-ENG 02-21 01Aug2021 Adoption of ANSI/CAN/UL 12402-4 (Level 100 lifejackets deemed equivalent to 46 CFR 160.055 life preservers)
CG-ENG 01-20 23Jun2020 Third Party Foam Concentrate Analysis
CG-ENG 01-18 01May2018 Equivalency Determination – FRP Gratings Conforming to ASTM F3059
CG-ENG 01-16 29Apr2016 Portable Accommodations Module (PAM) Guidance
CG-ENG 03-15 03Sep2015 Acceptance of CAP-437, Standards for Offshore Helicopter Landing Areas
CG-ENG 02-14 30Apr2014 Approval of Equivalencies to the Requirements for Odorizing Units on Fixed Carbon Dioxide Fire Extinguishing Systems
CG-ENG 01-14 04Mar2014 Lifeboat Release Mechanisms: Policy on Implementation of New SOLAS Regulation III/1.5 and IMO Circular MSC.1/Circ.1392
CG-ENG 05-12 07Sep2012 Policy on the Implementation of Additional Personnel Safety Requirements for Carbon Dioxide Fire Suppression Systems
CG-ENG 02-12, CH-1 04Mar2018 Acceptance of the 2009 MODU Code (initially issued 07May2012, CH-1 issued to address substantial amendments to the 2009 MODU Code)
Office of Operating and Environmental Standards (CG-OESformerly CG-522, G-3PSO, G-PSO, and G-MSO)
CG-OES 02-20 14Oct2020 Commercial Diving Operations - Equivalent Levels of Safety

 

District Eight (Gulf of Mexico) Policy

D8 policy letters that apply to MODUs are listed in the table below, grouped by issuing authority and ordered from newest to oldest (by policy number/original issue date). Click on the policy number to open the document (opens in a new window).

Note that policy letter numbers for all policies listed from 1999 and earlier do NOT have a policy number referenced on the letter itself, but the policy number listed was assigned by D8 for tracking purposes.

Policy Number Date Issued Subject
01-2020 19May2020 Emergency Evacuation Drills on Manned Facilities with Lifeboats
(CANCELLED 26Feb2024 by D8(do) Memo OCS-24010 dated 26Feb2024; policy is included here for historical reference purposes only)
04-2016,
Rev 1
07May2018 Lifesaving Inspection and Emergency Evacuation Drills on Manned Facilities (Including Mobile Offshore Drilling Units) on the Outer Continental Shelf (OCS) 
(CANCELLED 19May2020 by D8(ocs) Policy Letter 01-2020; policy is included here for historical reference purposes only)

PL 04-2016 is also available for historical reference purposes
03-2016 02Jun2016 Interim Coast Guard Eighth District Outer Continental Shelf (OCS) Risk-Based Inspection Resource Allocation Methodology
01-2015 14Sep2015 Outer Continental Shelf (OCS) Emergency Evacuation Plan (EEP) Approvals
Cancellation Notice 11Jul2014 Policy Cancellations - Memo detailing the cancellation of D8(m) Policy Letters
04-2003 30Sep2003 Outer Continental Shelf (OCS) Emergency Evacuation Plan (EEP) Approvals 
(CANCELLED 11Jul2014 by D8 OCS Memo (linked in this table), incorporated into MSM Vol II, Sec G; policy is included here for historical reference purposes only)
01-2002 25Oct2002 Delegation of Authority to OCMIs to Grant Drydock Extensions
99-19 16Sep1999 MODU Lifeboat Release Gear Overload Tests (alternate testing apparatus)
99-17 24Aug1999 MODU Berthing Sizes
07-1999 14Jul1999 Loadline Extension Authority up to 150 Days for Approved Assignment Authority
99-06 03Mar1999 Issuing COI Amendments (CG-858) 
(CANCELLED 11Jul2014 by D8 OCS Memo (linked in this table), incorporated into MSM Vol II, Sec G; policy is included here for historical reference purposes only)
09-1998 25Sep1998 Detainment of Vessels after a Serious Marine Incident
98-12 11Jun1998 Lifeboat Release Gear Tests
04-1998 06Apr1998 Drug and Alcohol Testing
97-17 30Jun1997 Manning Requirements for Non-Self Propelled MODUs
08-1997 13Aug1997 Testing of Liferaft Hydrostatic Release
97-08 21Apr1997 Accepting Classification Society Exams of Selected MODU Structures 
(CANCELLED 11Jul2014 by D8 OCS Memo (linked in this table), incorporated into MSM Vol II, Sec G; policy is included here for historical reference purposes only)
97-05 10Mar1997 STCW Applicability to MODUs
11-1995 20Nov1995 Eighth District Drug and Alcohol Policy
08-1989 22Aug1989 MODU Tailshaft Drawing Intervals

 

Navigation and Vessel Inspection Circulars (NVICs)

NVICs that apply to MODUs are listed in the table below, ordered from newest to oldest (by NVIC number). Click on the NVIC number to open the document (opens in a new window). ALL NVICs can be found on the Official NVIC Page.

NVIC Number Date Issued Subject
2020s
02-24 21Feb2024 Reporting Breaches of Security, Suspicious Activity, Transportation Security Incidents and Cyber Incidents
01-24 20Feb2024 Guidelines for Qualification for National Endorsements for Lifeboatman and Lifeboatman-Limited and STCW Endorsements for Proficiency in Survival Craft and Rescue Boats other than Fast Rescue Boats and Proficiency in Survival Craft-Limited
2010s
02-19, CH-2 22Jul2024 CH-2 to Guide to Marine Equipment Approvals Covered by a Mutual Recognition Agreement (MRA) (NVIC 02-19 superseded NVIC 08-04, CH-1)
01-15 21Jul2015 Title 46, Code of Federal Regulations (CFR), Part 4 Marine Casualty Reporting Procedures Guide with Associated Standard Interpretations
2000s
9-01 30Nov2001 Guidance on STCW Quality Standards Systems (QSS) for Merchant Mariner Courses or Training Programs
6-01 25May2001 Protective Equipment Required for Firefighter’s Outfits
09-00,
CH-1
10Feb2005 CH-1 to NVIC 09-00; Carbon Dioxide Fire Extinguishing System Safety
7-00 04Aug2000 Clarification of the Application of the International Convention on Standards of Training, Certification and Watchkeeping for Seafarers (STCW), 1978, as amended, to Vessels less than 200 Gross Register Tons (GRT)
3-00 11May2000 Manning and Training Guidance for Fast Rescue Boats on United States Vessels
1990s
10-99 10Sep1999 Interpretations of SOLAS Chapter II-2
5-99,
CH-1
13Oct2006 Guidance Regarding Voluntary Compliance with the International Management Code for the Safe Operation of Ships and for Pollution Prevention (International Safety management (ISM) Code)
3-99 29Jan1999 Global Maritime Distress and Safety System (GMDSS) and Emergency Position Indicating Radio Beacon (EPIRB) Equipment Requirements for Commercial Vessels
9-97,
CH-1
02Jul2010 CH-1 to NVIC 9-97, Guide to Structural Fire Protection
3-97 - Stability Related Review Performed by the American Bureau of Shipping for U.S. Flag Vessels
3-95 19Jul1995 Periodic Inspection and Testing of Fixed Halon Fire Fighting Equipment aboard Merchant Vessels
02-95,
CH-3
02Oct2018 The Alternate Compliance Program (ACP)
9-94 23Nov1994 Guidelines for Training and Certification in the Use of Marine Radar
6-94,
CH-1
- Guidance for Issuing International Oil Pollution Prevention (IOPP) Certificates under Annex I of the International Convention for the Prevention of Pollution from Ships, 1973, as modified by the Protocol of 1978 relating thereto (MARPOL 73/78)
2-94 15Mar1994 Guidance Regarding Voluntary Compliance with the International Management Code for the Safe Operation of Ships and for Pollution Prevention
(CANCELLED, see MSM Vol II; included here for historical reference purposes only)
1-94 21Jan1994 Marking of Life Preservers and PFDs
11-93,
CH-3
21Nov2003 CH-3 to NVIC 11-93, Applicability of Tonnage Measurement Systems to U.S. Flag Vessels
13-92 15Dec1992 Captain of the Port Zone Boundaries 
(CANCELLED 15Jul2021, see 
86 FR 37238included here for historical reference purposes only)
11-92 23Oct1992 Guidance for Acceptance of the National Board of Boiler and Pressure Vessel Inspectors (NBBI) National Board Inspection Code (NBIC) for Repairs and Alterations to Boilers and Pressure Vessels
10-92,
CH-2
04May2006 CH-2 to NVIC 10-92, Coast Guard Recognition of Registered Professional Engineer Certification of Compliance with Coast Guard Requirements
3-92 24Feb1992 Recommended Program for Protection of Merchant Mariners from Occupational Health Problems
2-92 04Feb1992 Survival Equipment for Lifeboats and Liferafts
11-91 16Jul1991 Ocean Tow of Jackup Drilling Units
1980s
7-89 08Jan1990 Maneuvering Information
4-89 27Nov1989 Introduction to Human Factors Engineering
3-89 07Sep1989 Guidelines for the Presentation of Stability Information for Operating Personnel
2-89 14Aug1989 Guide for Electrical Installations on Merchant Vessels and Mobile Offshore Drilling Units
1-89 15Mar1989 Underwater Survey Guidance
3-88,
CH-1
28Jan2000 CH-1 to NVIC 3-88, Issuance of Letters of Compliance to Foreign Documented Mobile Offshore Drilling Units Operating on the Outer Continental Shelf of the United States
(CANCELLED, see MSM Vol II, Sec G; included here for historical reference purposes only)

Original NVIC 3-88 (amended by CH-1) can be viewed here.
6-87 21Sep1987 Recommended Procedures for Control of Asbestos and Other Respiratory Hazards on board Merchant Vessels, Outer Continental Shelf (OCS) Facilities and Deepwater Ports
11-86 05Sep1986 Guidelines Governing the Use of Fiberglass Pipe (FGP) on Coast Guard Inspected Vessels
7-86 30Apr1986 Information on the Adequacy and Currency of Nautical Charts
4-86 28Mar1986 Hydraulic Release Units for Liferafts, Life Floats and Buoyant Apparatus and Alternate Float-Free Arrangements
1-86 15Jan1986 Shipment and Discharge of Seamen
4-85 incl Ch-1 and 2 09Oct1986 Recalls and Other Corrective Measures for Lifesaving Equipment
11-84 20Dec1984 Guidelines for New Construction or Major Modification of U.S. Flag Vessels in Foreign Shipyards
8-84 23Aug1984 Recommendations for the Submittal of Merchant Vessel Plans and Specifications
7-84 07Aug1984 Outer Continental Shelf (OCS) Citizenship Requirements; Exemptions from
4-84 24Apr1984 Equivalent Determination for Existing, Installed Oil-Water Separators which Have Not Received U.S. Coast Guard Approval
2-84 06Apr1984 Amendments to the 1974 Safety of Life at Sea (SOLAS) Treaty
1-84 03Apr1984 Lack of Topstitching on Some Type I Personal Flotation Devices (PFDs)
10-83 29Sep1983 Stability Approval and the Issuance of Stability Letters 
(CANCELLED 15Jul2021, see 
86 FR 37238included here for historical reference purposes only)
9-83 14Sep1983 Coast Guard Guidance Regarding Requirement for Charts and Publications 
(CANCELLED 15Jul2021, see 
86 FR 37238included here for historical reference purposes only)
8-83 09Aug1983 Guidance for Compliance with Annex I of the International Convention for the Prevention of Pollution from Ships, 1973, as modified by the Protocol of 1978 relating thereto (MARPOL 73/78)
5-83 28Apr1983 Unified Interpretations of the International Convention on Load Lines, 1966
10-82, 
CH-2
18Sep1989 CH-2 to NVIC 10-82, Acceptance of Plan Review and Inspection Tasks Performed by the American Bureau of Shipping (ABS) for New Construction or Major Modification of U.S. Flag Vessels
7-82 13Apr1982 Sample Format of Vessel or Facility Station Bill
10-81, 
CH-1
05Oct1981 Coast Guard Certification and Inspection of Certain Categories of Existing Vessels
9-81 10Aug1981 Coast Guard Guidance Regarding Shipboard Helicopter Facilities
6-81 18Jun1981 Lifeboat Weight Tests
7-80 02Apr1980 Use of Fire Detection Systems which are Not approved under 46 CFR 161.002
2-80 07Feb1980 Poured-Metal Socket Connections for Lifeboat Falls
1-80 14Jan1980 Inspection of Viking On-Load Release Gear on Watercraft America
1970s
4-78, 
CH-1
15Dec1978 Inspection and Certification of Existing Mobile Offshore Drilling Units
(Note that there is no record of CH-1 being officially promulgated. 4-78 was published as an Appendix to 46 CFR Subchapter I-A and changes would have had to follow the rulemaking process. Therefore, CH-1 is provided solely for historical reference purposes.)
5-77 20Dec1977 Inspection of Hydraulic Starting Systems for Lifeboats and Survival Capsules
7-74 06Dec1974 Oil-Water Separators; Acceptance of
6-72, 
CH-1
22Aug1972 Guide to Fixed Fire-Fighting Equipment aboard Merchant Vessels
6-70 23Aug1970 Fixed Fire Extinguishing Systems for Use in Galley Ventilating Equipment
1960s
12-69 12Dec1969 Special Examination in lieu of Drydocking for Large Mobile Drilling Units
1-69 08Jan1969 Automated Main and Auxiliary Machinery
8-68 15Nov1968 Classification of Vessels as Self-Propelled (CANCELLED 07Jul2014 by MSM Vol II, Sec G; included here for historical reference purposes only)
7-68 28Oct1968 Notes on Inspection and Repair of Steel Hulls
3-68 21Mar1968 Tensile Fasteners
3-67 17May1967 Alteration of Ship’s Structure which May Affect the Adequacy of Installed Safety Devices
1-66 25Jan1966 Requirements for Hull Structural Steel - Structural Continuity
2-63 24Jan1963 Guide for Inspection and Repair of Lifesaving Equipment
2-62 29Jan1962 Watertight Bulkheads in All Inspected Vessels, Maintenance of Watertight Integrity

 

MMS Work Instructions

Mission Management System (MMS) Work Instructions (WIs) that apply to mobile offshore drilling units (MODUs) are listed in the table below, grouped by issuing authority and ordered numerically by instruction number. All CVC MMS WIs can be viewed and accessed through the CG-CVC MMS page on their site. Click on the policy number to open the document (opens in a new window).

Office WI Number Date Issued Subject
Office of Commercial Vessel Compliance (CG-CVC)
CG-CVC CVC-WI-003(3) 03Nov2020 (Rev 3) USCG Oversight of Safety Management Systems on U.S. Flag Vessels
CG-CVC CVC-WI-004(3) 13Nov2023 (Rev 3) U.S. Flag Interpretations on the ISM Code
CG-CVC CVC-WI-014(1) 17Oct2018 Exercise of Enforcement Discretion with regard to MARPOL Annex VI Regulation 13.5.1.2
CG-CVC CVC-WI-018(2) 04Oct2022 (Rev 2) Laid up Inspected/Examined Vessels
CG-CVC CVC-WI-022(1) 13Jan2020 Implementation of Compliance/Enforcement Policy for MARPOL Annex VI Regulation 14, including IMO 2020 Sulfur Cap
CG-CVC CVC-WI-027(3) 11Oct2023 (Rev 3) Vessel Cyber Risk Management Work Instruction
CG-CVC CVC-WI-029(3) 14Jul2023 (Rev 3) Drydock Examination (DD) and Drydock Extension (DDX) Policy Clarifications (applicable to U.S. Flag MODUs only)
 
       

 

Marine Safety Information Bulletins (MSIBs)

MSIBs that apply to MODUs are listed in the table below, grouped by issuing authority and ordered from newest to oldest (by MSIB number/original issue date). Click on the MSIB number to open the document (opens in a new window).

Additional MSIBs issued by USCG Headquarters offices can be found here.

Office MSIB Number Date Issued Subject
Office of Commercial Vessel Compliance (CG-CVC)
CG-CVC 03-24 25Mar2024 Amendment to MARPOL Annex V/10: Update to Garbage Record Book Requirements
Office of Design and Engineering Standards (CG-ENG)
CG-ENG 07-22 14Nov2022 Changes to Survival Craft Equipment Requirements for U.S. Vessels
CG-ENG 06-22 18Oct2022 FM-200 Fire Extinguishing Agent Phasedown

 

Codes for the Construction and Equipment of Mobile Offshore Drilling Units (MODU Codes)

This page contains electronic versions (pdf) of all three MODU Codes, as amended, and the resolutions that implemented and amended the Codes. The electronic MODU Codes were assembled by the OCSNCOE from publicly-available IMO Resolutions and have been annotated by the OCSNCOE to assist with understanding the amendments and their applicability. Click on the document name or resolution number to open the document (opens in a new window).

For additional information related to the MODU Codes, please see Drill Down Issue #20.

OCSNCOE's Electronic Code Revision Date Document Description and Notes
2009 MODU Code
2009 MODU Code, 2024 Edition 28Sep2023

Fully Amended 2009 MODU Code, including 2013, 2014, 2016, 2017, 2022 and 2023 amendments (amendments entered into force on or before 01Jan2024).

Note: 2016 and 2017 amendments that entered force on 01Jan2020 are only required for MODUs constructed on/after 01Jan2020 and are noted by blue font in the document.

2009 MODU Code, 2020 Edition as amended thru 2020 07Sep2022

Historic reference: 2009 MODU Code, including 2013, 2014, 2016 and 2017 amendments (amendments entered into force on or before 01Jan2020). This edition does NOT include the 2022 and 2023 amendments. 2016 and 2017 amendments that entered force on 01Jan2020 are only required for MODUs constructed on/after 01Jan2020 and are noted by blue font in the document.

2009 MODU Code, 2016 Edition as amended thru 2016 07Sep2022

Historic reference: 2009 MODU Code, including 2013 and 2014 amendments (amendments entered into force on or before 01Jul2016). This edition does NOT include the 2016, 2017, 2022 and 2023 amendments. This amended edition is applicable to MODUs constructed on/after 01Jan2012 but BEFORE 01Jan2020.

1989 MODU Code
1989 MODU Code, 2024 Edition 28Sep2023 Fully Amended 1989 MODU Code, including 1992, 1994, 2004, 2013, 2014, 2022 and 2023 amendments (amendments entered into force on or before 01Jan2024).
1989 MODU Code, as amended thru 2016 06Sep2022

Historic reference: 1989 MODU Code, including 1992, 1994, 2004, 2013 and 2014 Amendments (amendments entered into force on or before 01Jul2016). This edition does NOT include the 2022 and 2023 amendments.

1979 MODU Code
1979 MODU Code, 2024 Edition 28Sep2023 Fully Amended 1979 MODU Code, including 1992, 2013, 2014, 2022 and 2023 amendments (amendments entered into force on or before 01Jan2024).
1979 MODU Code, as amended thru 2016 06Sep2022

Historic reference: 1979 MODU Code, including 1992, 2013 and 2014 Amendments (amendments entered into force on or before 01Jul2016). This edition does NOT include the 2022 and 2023 amendments.


The documents in the table above consist of the Assembly resolutions creating each Code and the corrigenda and resolutions amending each Code as summarized below. Click on the resolution number to open the document (opens in a new window).

Resolution Number Date Adopted Date Effective Subject
2009 MODU Code
MSC.547(107) 08Jan2023 01Jan2024

Amendment: Prohibition of asbestos in new installation of materials with reference to unified interpretation of implementation of the same.

See Unified interpretation on implementation of regulation 2.10.3 of the 2009 MODU Code, regulation 2.8.2 of the 1989 MODU Code and regulation 2.7.2 of the 1979 MODU Code (MSC.1/Circ.1671) and Guidelines for maintenance and monitoring of materials containing asbestos on MODUs (MSC.1/Circ.1672) that are both associated with this amendment.

MSC.506(105) 28Apr2022 01Jan2024 Amendment (applicable to all MODUs as referenced from other amended MODU Codes): Moves radio lifesaving appliances to Chapter 11 and the text of Chapter 11 is replaced in its entirety.
MSC.435(98) 09Jun2017 01Jan2020 Amendment: Added requirements from the findings associated with the MODU DEEPWATER HORIZON incident (applicable only to units constructed on/after 01Jan2020) to include:

- H-Class divisions;
- DP shutdowns during emergency drilling conditions;
- hazardous area electrical installations maintenance, qualifications and records;
- drill floor firefighting;
- lifesaving weight increases and dedicated rescue boats;
- designation of the master (when assigned) as the person in charge “at all times”; and
- man overboard and davit-launched liferaft drills.

MSC.407(96) 19May2016 01Jan2020 Amendment: Added FSS Code foam firefighting appliances compliance (applicable only to units constructed on/after 01Jan2020).
MSC/387(94) 18Nov2014 18Nov2014 Amendment: Added a new subparagraph related to alternate methods for lifeboat drills on MODUs (applicable to units constructed on/after 18Nov2014).
MSC.384(94) 21Nov2014 01Jul2016 Amendment: Added Chapter 15 with enclosed space atmosphere testing instrument and entry recommendations.
MSC 92/26/Add.1/Corr.1   26Nov2013 Corrigendum: Corrections pertaining to Resolution MSC.358(92) (see page 2 of the document).
MSC.359(92) 21Jun2013 01Jan2015 Amendment: added enclosed space entry and rescue procedures with drills and records requirements for the same.
A 26/Res.1023/Corr.1 17Jan2011 17Jan2011 Corrigendum: Corrections pertaining to Resolution A.1023(26).
A.1023(26) 02Dec2009 01Jan2012 Code for the Construction and Equipment of Mobile Offshore Drilling Units, 2009 (2009 MODU Code)
1989 MODU Code
MSC.546(107) 08Jan2023 01Jan2024

Amendment: Prohibition of asbestos in new installation of materials with reference to unified interpretation of implementation of the same.

See Unified interpretation on implementation of regulation 2.10.3 of the 2009 MODU Code, regulation 2.8.2 of the 1989 MODU Code and regulation 2.7.2 of the 1979 MODU Code (MSC.1/Circ.1671) and Guidelines for maintenance and monitoring of materials containing asbestos on MODUs (MSC.1/Circ.1672) that are both associated with this amendment.

MSC.505(105) 28Apr2022 01Jan2024 Amendment: Moves radio lifesaving appliances to Chapter 11 and text of Chapter 11 is replaced and requires radiocommunications to comply with Chapter 11 of the 2009 MODU Code, as amended through Resolution MSC.506(105). 
MSC.383(94) 21Nov2014 01Jul2016 Amendment: Added Chapter 15 with enclosed space atmosphere testing instrument and entry recommendations.
MSC 92/26/Add.1/Corr.1   26Nov2013 Corrigendum: Corrections pertaining to Resolution MSC.358(92) (see page 2 of the document).
MSC.358(92) 21Jun2013 01Jan2015 Amendment: Added enclosed space entry and rescue procedure with drills and records requirements for the same.
MSC.187(79) 09Dec2004 01Jul2006 Amendment: Amended the model MODU Safety Certificate by adding the completion date of the survey for which the certificate is based.
MSC.39(63) 19May1994   Amendment: Extended the Code on Alarms and Indicators to MODUs and provided amendments for the same. Resolution A.830(19) adopted on 23 November 1995 revoked MSC.39(63) and adopted the Code on Alarms and Indicators, 1995 (the Code is in the resolution’s Annex).
MSC.38(63) 19May1994 01Jul1994 and 03Feb2000 Amendment: Introduced the harmonized system of survey and certification (HSSC), updated control actions in Chapter 1 and the model MODU Safety Certificate in the Appendix, provided guidelines for units with dynamic positioning (DP) systems and replaced the text of Chapter 13 (helicopter facilities).
MSC/Circ.561   01Feb1992 Amendment: Revised the radio lifesaving requirements at 10.13 and replaced the text of Chapter 11 (radiocommunications).
A.649(16) 19Oct1989 01May1991 Code for the Construction and Equipment of Mobile Offshore Drilling Units, 1989 (1989 MODU Code)
1979 MODU Code
MSC.545(107) 08Jan2023 01Jan2024

Amendment: Prohibition of asbestos in new installation of materials with reference to unified interpretation of implementation of the same.

See Unified interpretation on implementation of regulation 2.10.3 of the 2009 MODU Code, regulation 2.8.2 of the 1989 MODU Code and regulation 2.7.2 of the 1979 MODU Code (MSC.1/Circ.1671) and Guidelines for maintenance and monitoring of materials containing asbestos on MODUs (MSC.1/Circ.1672) that are both associated with this amendment.

MSC.504(105) 28Apr2022 01Jan2024 Amendment: Moves radio lifesaving appliances to Chapter 11 and text of Chapter 11 is replaced and requires radiocommunications to comply with Chapter 11 of the 2009 MODU Code, as amended through Resolution MSC.506(105).
MSC.382(94) 21Nov2014 01Jul2016 Amendment: Added Chapter 15 with enclosed space atmosphere testing instrument and entry recommendations.
MSC.357(92) 21Jun2013 01Jan2015 Amendment: Added enclosed space entry and rescue drills (Chapter 10) and procedures and records (Chapter 14) requirements for the same.
MSC/Circ.561   01Feb1992 Amendment: Revised the radio lifesaving requirements at 10.7 and replaced the text of Chapter 11 (radiocommunications).
A.414(XI) 15Nov1979 31Dec1981 Code for the Construction and Equipment of Mobile Offshore Drilling Units (MODU Code; i.e., 1979 MODU Code)

 

MODU Applicability Flowchart

For a pdf of the applicability flowchart displayed below, click here.

Flowchart detailing the inspection options of MODUs working on the U.S. OCS

Inspection Job Aids

The following Job Aids pertain to Mobile Offshore Drilling Units working on the U.S. Outer Continental Shelf. Job Aids replaced the replaced the legacy CG-840 Books and can be a valuable tool for owners and operators to maintain regulatory compliance on their units.

Notes:

Job Aids are developed for use by the CG Marine Inspector, following internal CG procedures, and are provided as a convenience (and transparency) to industry. The Pre-Inspection/Pre-Exam and Follow-Up sections mainly pertain to administrative tasks of the Marine Inspector. While "if applicable" is NOT annotated within the Job Aid, there are inspection/exam items listed that may not apply to a particular unit.

Additional Job Aids and Marine Inspector Performance Qualification Standards (PQS) are available on CVC's MI Resources page.