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Policy and Guidance - Vessels involved in OCS Activities
The content listed below is available on this page. Use the tabs above to view the following categories:
1) COMDTINST 16000.7x series, Marine Safety (previously MSM Volume II);
2) Reference Books and Guides (compiled by subject);
3) Code of Federal Regulations (CFRs), including "Old" CFRs;
4) National Policy;
5) District Eight (Gulf of Mexico) Policy; and
6) Navigation and Vessel Inspection Circulars (NVICs).
COMDTINST 16000.76, Marine Safety: OCS Inspections (previously Section G of the Marine Safety Manual, Volume II)
Vessels that support or conduct OCS Activities fall under numerous vessel types and categories. The majority of the vessels that are involved in this work are Offshore Supply Vessels (OSVs), Industrial Vessels or Small Passenger Vessels. These vessels are mostly regulated under 46 CFR Subchapters L, I and T, respectively. 46 CFR Subchapters D, F, J, O and S and 33 CFR also have applicabilities to these vessel types. For vessels involved in OCS Activities, the following chapters of COMDTINST 16000.76, Marine Safety: Outer Continental Shelf Inspections apply:
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replaced Marine Safety Manual (MSM), Volume II: Section G - OCS Activities (cancelled 20Sep2021 and listed here for historical reference only).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.
Additional sections of the marine safety series that may apply to support vessels that conduct OCS activities follow (e.g, U.S. flagged OSVs, foreign units entering port, etc.).
Reference Books and Guides (compiled by subject)
Reference "Books" and Guides (by subject):
○ Global Maritime Distress and Safety System (GMDSS) Guide
○ Introduction to Dynamic Positioning (DP) Systems
○ Vessel General Permit
Code of Federal Regulations (CFRs)
CFRs that pertain to support vessels are as follows:
Primary subchapters for the vessel type -
○ 46 CFR Subchapter I - Cargo and Miscellaneous Vessels (often referred to as Industrial Vessels)
○ 46 CFR Subchapter L - Offshore Supply Vessels
○ 46 CFR Subchapter T - Small Passenger Vessels (Under 100 Gross Tons)
Additional subchapters that apply (not all will apply to each of the vessels inspected 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 D, I-A, N, O, V or W, 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 N - Outer Continental Shelf Activities
○ 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.
Additional CFRs that apply to certain operations or equipment -
○ 29 CFR Part 1915 - Occupational Safety and Health Standards for Shipyard Employment (the source for confined space entry requirements)
○ 47 CFR Part 80 - Stations in the Maritime Services (radio communication installation requirements)
CFRs can be viewed at ecfr.gov (regularly updated online version) or govinfo.gov (annual editions).
Old editions of the CFRs are available as follows (click on the "year" to open the document) for 'grandfathered' vessels:
○ 46 CFR Subchapter I, 1995 edition ("Old I") and 1963 edition ("Old-Old I")
○ 46 CFR Subchapter J, 1995 edition ("Old J") and 1981 edition ("Old-Old J")
○ 46 CFR Subchapter T, 1995 edition ("Old T")
National policy letters that apply to support vessels (OSVs, to include Liftboats, and small passenger vessels supporting oil and gas operations) 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).
Policy on the Implementation of IMO Resolution A.673(16), Guidelines for the Transport and Handling of Limited Amounts of Hazardous and Noxious Liquid Substances in Bulk on Offshore Support Vessels, for New and Existing Offshore Supply Vessels
Original CG-ENG Policy Letter 03-12, issued 15May2012 and CANCELLED by CG-ENG PL 03-12, CH-1, is available here; policy is included here for historical reference purposes only)
District Eight (Gulf of Mexico) Policy
D8 policy letters that apply to support vessels (OSVs, to include Liftboats, and small passenger vessels supporting oil and gas operations) 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.
Navigation and Vessel Inspection Circulars (NVICs)
NVICs that apply to support vessels (OSVs, to include Liftboats, and small passenger vessels supporting oil and gas operations) 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.
Marine Safety Information Bulletins (MSIBs)
MSIBs that apply to support vessels (OSVs, to include Liftboats, and small passenger vessels supporting oil and gas operations) 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.
Inspection Job Aids
The following Job Aids pertain to support vessels that work 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 vessels.
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 vessel.
Additional Job Aids and Marine Inspector Performance Qualification Standards (PQS) are available on CVC's MI Resources page.