The US Coast Guard operates the most intensive vessel inspection programme in the world — and it's fundamentally different from how other PSC regimes work. Unlike Paris or Tokyo MOU members who inspect only foreign-flagged vessels, the USCG runs two parallel programmes: domestic inspection of US-flagged vessels (issuing Certificates of Inspection under 46 CFR) and port state control examinations of foreign-flagged vessels calling at US ports. In 2024, the USCG conducted 8,711 SOLAS safety examinations on foreign vessels with 82 detentions (0.94% detention ratio), while simultaneously overseeing the entire US commercial fleet through COI inspections, Subchapter M towing vessel requirements, and commercial fishing vessel safety examinations. The USCG does not operate within a regional MOU — it runs its own independent PSC programme with its own targeting system, its own QUALSHIP 21 quality incentive programme, its own BWMS type approval requirements (separate from IMO), and its own advance notice of arrival system (eNOAD). For ship operators and US fleet managers, USCG compliance means navigating a unique regulatory layer that sits on top of international conventions, with requirements that are frequently stricter than IMO standards. Start a free trial of Marine Inspection to track USCG inspection readiness, COI management, and compliance documentation.

US Coast Guard: Vessel Inspection & Compliance
8,711
PSC Exams (2024)
Foreign vessel SOLAS safety examinations conducted
0.94%
Detention Rate
82 detentions in 2024 — down from 1.22% in 2023
96 hrs
eNOAD Advance Notice
Required before arrival at US ports
QS-21
QUALSHIP 21
Quality incentive for top-performing foreign vessels

Two Inspection Tracks: Domestic vs Foreign Vessels

The USCG inspection system splits into two distinct tracks depending on whether your vessel is US-flagged or foreign-flagged. Both tracks are enforced by the same Coast Guard personnel but under different regulatory frameworks.

US-Flagged Vessels
Certificate of Inspection (COI)
Authority: 46 CFR — Code of Federal Regulations, Title 46 (Shipping)
Certificate: COI issued by OCMI (Officer in Charge, Marine Inspection)
Inspections: Initial, annual, periodic, dry-dock, internal structural examinations
Subchapters: H (passenger), I (cargo), K (small passenger), T (small passenger <100 GT), M (towing)
Compliance: USCG option (direct CG inspection) or TSMS option (third-party for towing vessels)
Foreign-Flagged Vessels
Port State Control (PSC) Examination
Authority: 33 CFR Part 160 — SOLAS, MARPOL, STCW, MLC, ISPS, BWM
Process: Risk-based targeting via eNOAD data and vessel history
Exam types: Safety exam, security exam, environmental exam, COC exam (tankers)
Teams: Minimum 2 members — PSCO (certified officer) + PSCE (examiner)
Incentive: QUALSHIP 21 for consistently compliant vessels — reduced exam frequency

Key Subchapter Requirements for US Vessels

US-flagged vessels are regulated under specific 46 CFR subchapters based on vessel type. Each subchapter has distinct inspection intervals, equipment requirements, and manning standards. Book a Marine Inspection demo to see how subchapter-specific compliance tracking works.

Table 1: 46 CFR Subchapter Requirements by Vessel Type
Subchapter Vessel Type Key Requirements COI Renewal Dry-Dock Interval
H Passenger vessels (>100 GT) SOLAS standards, stability booklet, fire protection, LSA, structural fire protection 5 years Every 5 years (2x in 5-year COI period)
I Cargo/miscellaneous vessels SOLAS compliance, load line, cargo gear, firefighting, pollution prevention 5 years Every 5 years
K Small passenger vessels (under 100 GT, >6 passengers) Stability, fire protection, lifesaving, electrical, machinery, hull condition 5 years Every 5 years (or alternatives per OCMI)
T Small passenger vessels (under 100 GT, route-specific) Similar to K with route-specific adjustments, crew requirements, PFD carriage 5 years Every 5 years
M Towing vessels SMS or TSMS required. Two compliance options: USCG direct inspection or TSMS (third-party organisation oversight). Fully implemented since July 2018. 5 years Per TSMS schedule or CG requirement
D Tank vessels (domestic) Hull construction, cargo systems, fire protection, vapor recovery, pollution prevention 5 years Every 2.5 years

Foreign Vessels: What the USCG Checks Differently

The USCG PSC programme goes beyond standard MOU inspections in several important ways. Understanding these US-specific requirements prevents costly surprises.

BWMS Type Approval
USCG requires its own type approval for ballast water management systems — separate from IMO type approval. Ships with IMO-only approval can use Alternate Management Systems (AMS) temporarily, but must transition to USCG-approved systems. USCG is deploying portable DNA analysers for onboard compliance testing.
Certificate of Compliance (COC)
Non-US flag tank vessels carrying liquid bulk hazardous cargoes must hold a valid USCG COC — a unique US requirement not found in other PSC regimes. COC inspections verify double-hull standards, vapour collection, cargo fire protection, and tank construction. Annual and renewal exams required.
96-Hour eNOAD
Foreign vessels must submit electronic Notice of Arrival (eNOAD) at least 96 hours before arrival at US ports (24 hours if transit time is shorter). Submitted to NVMC. Incomplete or late eNOAD can trigger priority examination and delays.
MARPOL Annex VI — EPA Enforcement
US enforcement of MARPOL Annex VI is jointly conducted by USCG and EPA under APPS (Act to Prevent Pollution from Ships). Violations can result in criminal and civil penalties. North American ECA fuel sulphur compliance (0.10%) is strictly enforced.

QUALSHIP 21: The Quality Incentive

QUALSHIP 21 rewards foreign vessels that demonstrate the highest commitment to quality and safety. Enrolled vessels receive reduced examination frequency — a significant operational and commercial advantage for vessels trading regularly to the US. Sign up for Marine Inspection to track the compliance standards needed for QUALSHIP 21 eligibility.

Table 2: QUALSHIP 21 & E-Zero Programme Requirements
Criteria QUALSHIP 21 E-Zero (Additional)
Flag State Must be registered to a qualified flag (3-year rolling detention rate below threshold) Same as QUALSHIP 21
Classification Society Must be classed by a recognised organisation with acceptable performance Same as QUALSHIP 21
Vessel History No detentions, no APPS violations, clean PSC exam history in US waters Plus: no environmental violations, exemplary environmental compliance
Enrolment Duration Application reviewed by CG-CVC — certificate issued if criteria met Minimum 3 consecutive years in QUALSHIP 21 before E-Zero application
Benefits Reduced PSC exam frequency. Priority scheduling. Positive recognition. Permitted to conduct cargo operations within 6 months of COC annual/renewal due date
Eligibility Review Annual — based on USCG Annual Report data, effective 30 June each year Same annual review cycle
Stay USCG-Ready at Every US Port Call
COI tracking, PSC exam preparation, eNOAD documentation, BWMS compliance records, fuel sulphur documentation, COC management — Marine Inspection gives ship operators and fleet managers complete USCG compliance visibility.
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How Marine Inspection Helps with USCG Compliance

USCG inspections demand the highest documentation standards in the industry — every certificate, record book, and maintenance log must be current, complete, and instantly accessible. Marine Inspection is purpose-built for this level of readiness.

COI & Certificate Tracking
Automated 90/60/30-day expiry alerts for COI, SMC, ISSC, IOPP, IAPP, MLC, IBWMC, and every other statutory certificate. Never face an inspection with an expired document.
Pre-Arrival Checklists
USCG-specific digital checklists completed before every US port call with timestamped evidence and photo documentation. Covers all PSC exam areas, eNOAD compliance, and COC readiness.
Hours of Rest Monitoring
Automated rest hour tracking for every crew member with violation alerts before they occur. USCG PSCOs specifically check rest records during MLC-related examinations.
Deficiency Management
Track every USCG deficiency from finding through corrective action to close-out with documented evidence. Previous inspection history organised and accessible for the next examination.
Subchapter M (Towing Vessels)
TSMS compliance documentation, TPO audit tracking, vessel survey scheduling, towing gear certificate management — purpose-built for the towing industry's unique USCG requirements.
Record Book Digitisation
Oil Record Books, Garbage Record Books, BWRB, and maintenance logs digitised with audit-ready formatting. USCG PSCOs can verify complete, signed records instantly — no binder shuffling.

USCG Compliance Checklist

Use this before every US port call. The USCG applies both international conventions and US-specific requirements — this checklist covers both layers. Schedule a demo to see how Marine Inspection automates this checklist across your fleet.

USCG — Pre-Arrival Compliance Checklist
Advance Notice & Documentation
eNOAD submitted to NVMC at least 96 hours before arrival (or 24 hours if transit <96 hours)
All statutory certificates valid — SOLAS, MARPOL, STCW, MLC, ISPS, BWM, Load Line
ISM — SMC and company DOC valid, SMS effectively implemented
COC valid (if tanker carrying liquid bulk hazardous cargo) — annual/renewal exam current
US-Specific Requirements
BWMS type-approved by USCG (not just IMO) — or valid AMS letter on file
North American ECA fuel compliance — 0.10% sulphur, BDNs available, fuel changeover documented
Continuous Synopsis Record (CSR) current and consistent with certificates
QUALSHIP 21 certificate current (if enrolled) — no violations that would void eligibility
Safety & Environmental
Fire safety equipment operational — fire doors, detection, extinguishers, emergency lighting
Lifesaving appliances ready — EPIRBs, SART, liferafts in survey, immersion suits for crew
Oil Record Book current — all entries complete, OWS operational, no bypass evidence
SOPEP onboard and current — spill response contacts updated for US waters
Crew & Security
All officers' STCW certificates valid with flag endorsements matching positions
Hours of rest records maintained — no 10hr/77hr violations
ISPS Code compliance — ISSC valid, security procedures at appropriate level, crew briefed
Crew can demonstrate emergency procedures if drills requested — fire, abandon ship, steering gear

Frequently Asked Questions

How is USCG PSC different from Paris/Tokyo MOU?
The USCG operates independently — it is not a member of any regional MOU. Key differences: it conducts both domestic and foreign vessel inspections, requires USCG-specific BWMS type approval, issues Certificates of Compliance (COC) for foreign tankers, uses QUALSHIP 21 (not White-Grey-Black lists) as its quality incentive, requires 96-hour eNOAD advance notice, and enforces MARPOL Annex VI jointly with EPA under US criminal law. Detention data is shared with MOUs but the targeting system is independent.
What is a Certificate of Inspection (COI)?
A COI is the USCG certificate issued to US-flagged inspected vessels confirming the vessel meets all applicable 46 CFR requirements for its type and service. Valid for 5 years with annual inspections, periodic inspections, and dry-dock examinations. The COI specifies the vessel's authorised route, passengers, crew, equipment, and operating conditions. Towing vessels under Subchapter M can obtain COI through either direct USCG inspection or the TSMS (Towing Safety Management System) option using a Third Party Organisation (TPO).
What is QUALSHIP 21?
QUALSHIP 21 (Quality Shipping for the 21st Century) is a USCG programme rewarding foreign vessels that demonstrate the highest commitment to safety and compliance. Eligible vessels must be flagged by a qualified administration (below detention threshold), classed by a recognised organisation with acceptable performance, and have a clean PSC examination history in US waters. Benefits include reduced examination frequency and priority scheduling. The E-Zero designation adds recognition for exemplary environmental compliance after 3+ years in QUALSHIP 21.
What is Subchapter M and who does it affect?
Subchapter M (46 CFR Part 136-144) is the USCG inspection regime for towing vessels, fully implemented since July 20, 2018. It requires all towing vessels to obtain a COI through one of two compliance options: the USCG option (direct Coast Guard inspection) or the TSMS option (Towing Safety Management System with Third Party Organisation oversight). TSMS requires an audited safety management system, vessel surveys, and management audits — similar to ISM Code but specific to the towing industry.
What happens if my eNOAD is late or incomplete?
Failure to submit a timely and accurate eNOAD can result in enforcement actions including civil penalties, priority examination upon arrival (your vessel will be targeted for detailed inspection), and operational delays. The eNOAD must be submitted at least 96 hours before arrival at US ports (24 hours if transit time is shorter), and updates must be submitted as soon as practicable but at least 12 hours before arrival if information changes.
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COI management, PSC exam preparation, eNOAD tracking, BWMS compliance, COC documentation, Subchapter M workflows, QUALSHIP 21 eligibility monitoring — one platform for every USCG requirement, domestic and foreign.
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