B1 OCS vs B1 for Wind Activities: Key Differences Every Offshore Crew Member Must Know in 2026

Introduction: Why This Distinction Matters Now More Than Ever

If you're an offshore crew member planning to work on U.S. projects in 2026, understanding the difference between B1 OCS visas and B1 Wind visas could be the difference between a smooth deployment and a costly visa denial. These are not interchangeable categories—they have separate legal foundations, different documentation requirements, and distinct eligibility criteria.

The distinction has never been more important. With the U.S. offshore wind sector facing unprecedented regulatory scrutiny under the Trump administration's January 2025 leasing halt, crews need precise information to navigate visa applications correctly. Meanwhile, oil and gas operations continue to operate under established B1 OCS frameworks while new regulatory threats from the American Offshore Worker Fairness Act (AOWFA) loom.

At CrewVisas, we've processed over 3,000 offshore crew visa applications across these categories. This guide synthesizes our experience with the latest 2026 regulations to explain these critical differences. Whether you're joining a drilling platform in the Gulf of Mexico or installing turbines off the Massachusetts coast, this article will help you identify which visa you actually need—and why applying for the wrong one can derail your deployment.

What is B1 OCS? Understanding the Legal Foundation

The OCSLA Legal Framework (43 USC 1356)

The B1 OCS visa is your gateway to temporary work on the U.S. Outer Continental Shelf (OCS)—but only for specific resource extraction activities. Its legal foundation is the Outer Continental Shelf Lands Act (OCSLA), codified as 43 U.S.C. § 1356, enacted in 1978.

OCSLA extends federal jurisdiction to submerged lands beyond U.S. territorial waters. The Act's primary purpose is to govern mineral extraction—specifically oil and gas exploration, development, and production. When Congress designed OCSLA, it explicitly addressed the manning (crewing) requirements for vessels and platforms operating in these high-value, regulated industries.

The statute requires that vessels and platforms engaged in OCS activities be crewed by U.S. citizens or lawful permanent residents unless certain exemptions apply. For foreign-flagged vessels that are more than 50% foreign-owned or controlled, the U.S. Coast Guard can issue exemption letters that allow foreign crews. That exemption is where the B1 OCS visa comes in.

Who Can Apply for B1 OCS?

You qualify for a B1 OCS visa if you:

• Are employed temporarily on a foreign-owned or controlled vessel, rig, or platform operating on the U.S. OCS

• Work in OCS-defined activities: exploration for, or development and production of, minerals (oil and gas)

• Have a U.S. Coast Guard exemption letter issued to your employer proving the vessel meets the 50%+ foreign ownership threshold

• Have legitimate, limited-time employment with a defined contract period (typically 3–6 months)

• Intend to return to your home country after your assignment

• Are otherwise admissible to the United States (no criminal bars, visa violations, etc.)

Typical Roles Requiring B1 OCS

• Petroleum engineers

• Well specialists and drilling supervisors

• Technicians (equipment, subsea, mechanical)

• Divers and diving supervisors

• Maintenance and operations personnel

• Safety engineers and inspectors

• Offshore construction managers

Geographical Scope

The OCS is divided into four regions: 1. Gulf of Mexico (most active for oil/gas) 2. Atlantic (primarily exploration leases) 3. Pacific (limited activity) 4. Alaska (minimal current activity)

What is B1 for Wind Activities? The State Department's Regulatory Innovation

The August 2019 Annotation: A Response to Legal Uncertainty

In August 2019 (technically amended August 20, 2019 in the Foreign Affairs Manual), the U.S. State Department introduced a new B1 visa annotation specifically for offshore wind workers. The annotation reads:

"B-1 for Transit or Travel to the OCS for Wind Activities; Not OCS Activity"

This wasn't bureaucratic semantics—it was a solution to a regulatory deadlock that was preventing offshore wind development from accessing needed international expertise.

Why Offshore Wind Needed Its Own Visa Category

Before 2019, offshore wind crews attempting to get B1 visas faced a critical problem: The U.S. Coast Guard explicitly stated it did not have statutory authority to regulate wind farms on the OCS.

Why? Because OCSLA defines OCS activity as:

"Any offshore activity associated with the exploration for, or development or production of, the minerals of the [OCS]."

Wind energy extraction is not mineral extraction. A wind turbine generates electricity from wind—not from resources extracted from the seabed. The Coast Guard's interpretation was legally defensible under the statute as written. This meant the USCG would not issue Manning Exemption Letters for wind projects, and wind crews couldn't obtain traditional B1 OCS visas.

Crews were stuck. They couldn't use B1 OCS (no exemption letter available). The standard C-1/D crew visa was valid for only 29 days—insufficient for offshore wind installation projects spanning weeks or months. Embassies were inconsistently issuing B1 visas for "transit" but with no clear legal guidance.

The State Department's solution: Create a B1 visa annotation that acknowledges wind as non-OCS activity but grants sufficient visa validity for wind crews to complete their work. This annotation does not require a USCG Manning Exemption Letter because wind is explicitly not an OCS activity.

Who Can Apply for B1 Wind?

You qualify for a B1 Wind visa if you:

• Are employed temporarily on a vessel or at a facility engaged in offshore wind activities on the OCS

• Work on wind farm construction, installation, maintenance, or operations

• Do NOT have a U.S. Coast Guard exemption letter (one is not required or available for wind)

• Are joining a specific vessel or project for a defined, limited-time assignment

• Can demonstrate the project's legitimacy through employer letters and project documentation

• Intend to return to your home country upon completion of work

Typical Roles Requiring B1 Wind

• Turbine installation technicians (WTIV crews)

• Subsea cable engineers

• Offshore safety personnel

• Foundation installation specialists

• Vessel deck crew (support vessels)

• Project engineers and supervisors

• Inspection and quality assurance personnel

• GWO (Global Wind Organisation) certified technicians

Current Major U.S. Projects (2026 Status)

As of March 2026, the largest U.S. offshore wind projects include:

Project	Capacity	Status	Developer
Coastal Virginia Offshore Wind (CVOW)	2.6 GW	Court-approved to resume	Dominion Energy
Vineyard Wind 1	806 MW	Operational (first power Feb 2024)	Avangrid/CIP
Empire Wind 1	810 MW	Under construction	Equinor
Revolution Wind	704 MW	Court-approved to resume	Ørsted/Skyborn
Sunrise Wind	924 MW	Seeking injunction	Ørsted

All of these projects utilize B1 Wind visas for international crew members.

The Legal Distinction: Why Wind is NOT "OCS Activity" Under OCSLA

This is the cornerstone difference, and it's worth understanding in detail.

OCSLA's Narrow Statutory Scope

When Congress passed OCSLA in 1978, the geopolitical and energy landscape was entirely different. Oil and gas production on the continental shelf represented the frontier of U.S. energy independence. OCSLA's definition of "OCS activity" explicitly references the extraction of minerals from the subsoil and seabed.

The statute itself (43 U.S.C. § 1333) extends federal law to:

"[T]he soil and seabed of the Continental Shelf and to all artificial islands, and all installations or other devices permanently or temporarily attached to the seabed which may be erected thereon for the purpose of exploring for, developing, or producing resources therefrom" [emphasis added]

The phrase "resources therefrom" refers to resources from the seabed and subsoil—oil, natural gas, minerals.

Wind Energy: Resources from the Atmosphere, Not the Seabed

Wind turbines are fundamentally different. They extract kinetic energy from the atmosphere, not from the seabed. While the structure is anchored to the seafloor, the resource being harvested is the wind.

This distinction is not academic—it's statutory. A literal reading of OCSLA's definition excludes wind because:

1. Wind is not a "mineral" in geological terms

2. Wind is not extracted "from the seabed" or "subsoil"

3. The purpose of a wind turbine is to generate electricity from atmospheric resources, not seabed resources

The U.S. Coast Guard maintained this interpretation officially. The Coast Guard Regulations (33 CFR 140.10) define "OCS activity" consistently:

"Any offshore activity associated with the exploration for, or development or production of, the minerals of the [OCS]."

Because wind production doesn't meet this definition, the USCG concluded it lacked statutory authority to issue Manning Exemption Letters for wind farms.

Congress's Attempt to Close the Gap (2021 OCSLA Amendment)

In the 2021 National Defense Authorization Act (NDAA), Congress amended OCSLA to explicitly include "non-mineral energy resources" within the Act's scope. This was intended to clarify that renewable energy development on the OCS falls within OCSLA's regulatory framework.

However—and this is critical—Congress did NOT amend the manning requirements section to apply to wind activities. As noted in recent legal analysis by Jones Walker LLP (September 2024):

"Although CBP extended the application of the Jones Act to wind activities on the OCS pursuant to the 2021 amendment to OCSLA, the Coast Guard did not do the same with respect to the OCS manning requirements. As such, the OCS manning requirements discussed herein are applicable to oil and gas activities on the OCS but not wind activities."

This means:

• The Jones Act (coastwise trade law) applies to offshore wind

• The OCSLA manning requirements do not apply to offshore wind

• Wind crews still cannot get U.S. Coast Guard Manning Exemption Letters

• The B1 Wind visa annotation remains the correct pathway

Side-by-Side Comparison Table: B1 OCS vs B1 Wind

Criteria	B1 OCS	B1 Wind
Legal Basis	OCSLA (43 USC 1356) - mineral extraction	State Department FAM Amendment (Aug 2019) - non-OCS activity
Visa Annotation	"B-1 for OCS Activities"	"B-1 for Transit/Travel to OCS for Wind Activities; Not OCS Activity"
USCG Exemption Letter Required?	YES (mandatory)	NO (not issued; not needed)
Types of Exemption Letters	LOA (Non-Applicability), LOE (Exemption), LOD (Determination)	N/A
Timeframe for USCG Processing	60–90 days typically	N/A
Activities Covered	Oil/gas exploration, development, production; drilling; well operations	Wind turbine installation, maintenance, construction; subsea cables
Industries	Oil & gas (Transocean, Seadrill, Valaris, etc.)	Offshore wind (Ørsted, Dominion, Equinor, Avangrid, etc.)
Typical Visa Validity	3–6 months (project-based)	Duration of work (3–12 months possible)
C-1/D Alternative?	Not suitable (only 29 days; OCSLA requires citizenship restrictions)	Not suitable (only 29 days; insufficient for wind projects)
Jones Act Application	Yes (always applied)	Yes (since 2021 OCSLA amendment)
Manning Restrictions	Strict OCSLA citizen/LPR requirements; exemption letter bypasses them	No statutory manning restrictions; wind is non-OCS activity
DS-160 Form Notes	Specify OCS activity type (drilling, production, etc.); include USCG letter details	Specify wind project; include project documentation; no USCG letter
Employer Documentation	Contract, employment letter, USCG exemption letter, vessel IMO/registry, safe manning document	Employment contract, project invitation, company documentation, project scope
Interview Focus	OCS-specific expertise, temporary intent, project necessity	Wind industry expertise, project timeline, temporary intent
Post-Visa Switching	Cannot hold both simultaneously; switching requires new visa	Cannot hold both simultaneously; switching requires new visa

Application Process Differences: DS-160 Form Completion and Documentation

B1 OCS Visa Application Process

Step 1: Employer Secures USCG Exemption Letter (60–90 Days)

Before you even fill out a visa form, your employer must petition the U.S. Coast Guard:

• Letter of Determination (LOD): Certifies you are NOT part of the vessel's regular complement (crew); you're a temporary specialist (engineer, diver, technician)

• Letter of Non-Applicability (LOA): Certifies the vessel is >50% foreign-owned, so OCSLA manning requirements don't apply

• Letter of Exemption (LOE): Certifies the vessel may employ non-citizens in specific regular complement positions (valid 1 year)

The employer submits documentation to USCG including vessel IMO number, registry, ownership structure, safe manning document, and proof of contract for the foreign worker.

Step 2: You Complete DS-160 Online

Your DS-160 (Nonimmigrant Visa Application) must include:

• Your occupation and role (petroleum engineer, driller, technician, etc.)

• Your employer's company details (name, location, industry—"offshore oil & gas drilling")

• Your assignment: OCS activity type (drilling, production, subsea work, maintenance)

• Project/vessel details (name, location in OCS region, IMO if vessel)

• Contract duration (start and end dates)

• Your employer's attestation that USCG exemption letter has been obtained

Step 3: Gather Required Documents

• Valid passport (6+ months validity)

• DS-160 confirmation page

• Visa application fee receipt

• USCG exemption letter (original or certified copy) —CRITICAL

• Employment contract

• Company letter on official letterhead (names hiring company, role, duration, salary if applicable)

• Proof of ties to home country (employment, family, property)

• Proof of financial means (bank statements)

• Medical certificate if required by your company (ENG1 for seafarers)

• STCW certificate (if you're a seafarer)

• Offshore safety certificates (BOSIET, HUET, H2S, etc. as required by project)

Step 4: Schedule Embassy Interview

You attend an interview at the U.S. Embassy or Consulate in your home country. The consular officer will:

• Verify the USCG exemption letter

• Confirm the OCS activity is mineral-related (oil/gas)

• Assess your nonimmigrant intent (you'll return after the contract)

• Ask about your technical expertise and project specifics

Step 5: Visa Issuance

If approved, you receive a B-1 visa with the "OCS" annotation in your passport. Validity is typically 3–6 months, matching your project duration.

B1 Wind Visa Application Process

Step 1: Skip the USCG Process Entirely

This is the major difference. Your employer does NOT petition the Coast Guard. The B1 Wind visa exists precisely because USCG has no authority over wind activities.

Step 2: Complete DS-160 Online

Your DS-160 must include:

• Your occupation and role (turbine technician, cable engineer, safety officer, etc.)

• Your employer's company details (wind project developer, vessel operator, or contractor)

• Clearly state: "offshore wind farm operations" or "wind turbine installation"

• Project name and location (e.g., "Vineyard Wind 1, offshore Massachusetts")

• Assignment duration (start and end dates)

• State that the activity is wind energy, NOT oil/gas, NOT traditional OCS activity

Step 3: Gather Required Documents

• Valid passport (6+ months validity)

• DS-160 confirmation page

• Visa application fee receipt

• No USCG exemption letter (it won't exist)

• Employment contract or job offer letter

• Company letter on official letterhead (project name, role, duration, wind industry designation)

• Project documentation (project overview, company website info, permit confirmations if public)

• Proof of ties to home country

• Proof of financial means

• GWO (Global Wind Organisation) certifications (increasingly required)

• Other industry certifications (H2S, RFID/TWIC awareness, first aid, etc.)

• Offshore safety training certificates

Step 4: Schedule Embassy Interview

The consular officer will:

• Verify that the project is legitimate (may reference BOEM leases, project news)

• Confirm the activity is wind-related, NOT OCS mineral activity

• Assess your nonimmigrant intent

• Ask about your wind industry experience and certifications

• Do NOT expect USCG documentation (if they ask for it, the Embassy may be unfamiliar with B1 Wind; provide State Department FAM citations)

Step 5: Visa Issuance

If approved, you receive a B-1 visa with the annotation "B-1 for Transit or Travel to the OCS for Wind Activities; Not OCS Activity." Validity can extend to 12 months or longer, depending on project needs.

US Coast Guard Manning Exemption: Does It Apply to Both?

B1 OCS: Exemption Required and Critical

For B1 OCS visas, the U.S. Coast Guard Manning Exemption Letter is absolutely mandatory.

Here's why: OCSLA mandates that vessels and platforms on the OCS must be crewed by U.S. citizens or lawful permanent residents. The only exception is for foreign-flagged vessels that are >50% foreign-owned. Even then, the USCG requires a Letter of Non-Applicability (LOA) confirming that OCSLA manning requirements don't apply to that specific vessel.

For personnel who are not part of the regular crew—temporary specialists like engineers or divers—the USCG issues a Letter of Determination (LOD), confirming you're exempt from crewing requirements.

Without the exemption letter, you cannot obtain a B1 OCS visa. Embassies will not issue the visa if the USCG letter is missing or invalid.

B1 Wind: No Manning Exemption Needed

For B1 Wind visas, no USCG exemption letter exists or is needed. This is by design.

The Coast Guard has repeatedly stated it does not have statutory authority to regulate wind farms on the OCS because wind is not an "OCS activity" under OCSLA. Therefore:

• The USCG will not issue Letters of Non-Applicability for wind vessels

• The USCG will not issue Letters of Determination for wind personnel

• Wind projects have no OCSLA manning requirements

• No exemption letter is required for a B1 Wind visa

If an Embassy asks for a USCG exemption letter for your B1 Wind visa, politely explain that: 1. Your project is wind, not OCS mineral activity 2. USCG has no authority over wind per its statutory interpretation 3. The B1 Wind visa is issued under State Department authority, not USCG authority 4. The visa annotation explicitly states "Not OCS Activity"

Provide a citation to the Foreign Affairs Manual (FAM) 9 Section 402.2-5(C)(9), which contains the B1 Wind guidance.

Who Uses Which? Real-World Examples and Current Projects

B1 OCS: Oil & Gas Drilling Operations

Major Companies:

• Transocean (world's largest offshore drilling contractor; primarily Gulf of Mexico)

• Seadrill (Norwegian offshore driller; Gulf of Mexico and Atlantic operations)

• Valaris (formerly ENSCO; significant Gulf of Mexico presence)

• Noble Drilling (deepwater and midwater operations)

• Diamond Offshore Drilling (rig operator in U.S. waters)

Typical Roles Using B1 OCS:

• Well engineers designing drilling programs

• Drilling supervisors and tool pushers

• Derrickmen and roughnecks (for specialized tasks)

• Subsea engineers (wellhead and pipeline specialists)

• Divers and diving supervisors

• Equipment technicians (blowout preventers, pumps, etc.)

• Safety engineers and inspectors

Example Deployment Scenario: An engineer from Norway is hired by Transocean to supervise drilling operations on a Gulf of Mexico platform. Her employer requests a Letter of Determination from USCG (confirming she's not part of regular crew, just a temporary specialist). She completes DS-160, attends an interview in Oslo, and receives a B1 OCS visa valid for 6 months. She works offshore for 5 months, then returns to Norway.

B1 Wind: Offshore Wind Installation and Operations

Major Developers:

• Dominion Energy (Coastal Virginia Offshore Wind, 2.6 GW; building own U.S.-flagged WTIV "Charybdis")

• Ørsted (Revolution Wind, Sunrise Wind, combined ~1.6 GW)

• Equinor (Empire Wind 1 & 2, ~2 GW; Bakken project)

• Avangrid (Vineyard Wind 1, 806 MW; operational as of Feb 2024)

• Skyborn Renewables (50% partner in Revolution Wind)

Typical Roles Using B1 Wind:

• WTIV (wind-turbine installation vessel) deck crew

• Turbine technicians and engineers

• Subsea cable installation engineers

• Foundation installation specialists

• Safety officers and supervisors

• Project engineers

• Inspection and quality assurance personnel

• Specialized technicians (GWO-certified)

Example Deployment Scenario: A Danish cable engineer is hired by Ørsted to install subsea export cables for Revolution Wind off Rhode Island. His company (Ørsted subcontractor) provides an employment letter confirming the project name and duration. He completes DS-160 (no USCG letter needed), attends an interview in Copenhagen, and receives a B1 Wind visa valid for 8 months. He works for 7 months on cable installation, then returns to Denmark.

Common Mistakes: Applying for the Wrong Visa Type and Consequences

Mistake #1: Applying for B1 OCS When You Need B1 Wind

The Error: A wind project engineer applies for a B1 OCS visa because she's seen the term "OCS" and assumes all offshore continental shelf work requires this visa.

What Happens: 1. USCG exemption letter does not exist for wind projects 2. She cannot obtain the USCG letter (USCG won't issue it; wind isn't OCS activity) 3. DS-160 states her role is "wind turbine maintenance"—not oil/gas 4. Embassy officer sees the inconsistency and denies the B1 OCS application 5. She is denied under INA Section 214(b) (presumption of immigrant intent; credibility issue) 6. Consequence: Visa denial; 6–12 month wait before reapplication; potential additional scrutiny on future applications

Mistake #2: Applying for B1 Wind When You Need B1 OCS

The Error: A driller working on an oil platform applies for B1 Wind because he heard "it's easier—no USCG letter needed."

What Happens: 1. His employer has obtained a valid USCG Letter of Determination (LOD) 2. DS-160 states his role is "drilling operations" on an oil and gas vessel 3. Embassy officer notes the B1 Wind annotation doesn't match oil/gas activity 4. The visa is denied because B1 Wind is explicitly for non-OCS (non-mineral) activity 5. Consequence: Visa denial; project delay; lost wages during reapplication

Mistake #3: Misrepresenting the Nature of Your Work

The Error: Applying for B1 Wind but listing employer as "oil and gas company" or activities as "energy sector operations" without specifying wind.

What Happens: 1. Consular officer sees ambiguous wording and requests clarification 2. Application goes into administrative processing (delays) 3. If they suspect misrepresentation (even unintentional), visa is denied 4. Consequence: Denial; future applications face increased scrutiny for fraud concerns

Mistake #4: Applying for B1 OCS Without USCG Exemption Letter

The Error: Crew member arrives at the embassy with employment letter but no USCG exemption letter, assuming the employer will "get it later."

What Happens: 1. Consular officer cannot issue B1 OCS without USCG letter (policy and procedure) 2. Application is refused under INA Section 221(g) (incomplete application) 3. Applicant is told to reapply only after employer obtains USCG letter 4. Consequence: Visa denial; 60–90 day delay for USCG processing; missed deployment window

Mistake #5: Applying for B1 Wind and Mentioning Non-OCS Work

The Error: Applicant states "I might work in state waters or onshore" when asked about scope of work.

What Happens: 1. B1 Wind is explicitly for OCS (federal waters) wind activities only 2. If the work includes non-OCS (within 3 nautical miles) or onshore work, B1 Wind doesn't cover it 3. Consular officer may deny because the visa category doesn't match the described work 4. Consequence: Denial; need different visa category (B-1 for onshore work, visitor visa, etc.)

Jones Act and Its Intersection with Both Visas

The Jones Act (46 U.S.C. § 55102), codified as Section 27 of the Merchant Marine Act of 1920, is a cornerstone of U.S. maritime law. It requires vessels engaged in coastwise trade to be U.S.-built, U.S.-owned, U.S.-flagged, and U.S.-operated, with U.S. citizen crews.

Jones Act and B1 OCS

Applicability: YES—Jones Act has always applied to oil and gas operations on the OCS.

Impact: The Jones Act restricts foreign-flagged vessels in certain OCS operations. However:

• Foreign-flagged vessels that are >50% foreign-owned can operate on the OCS with USCG exemption

• When they do, they use foreign crews

• Those foreign crews obtain B1 OCS visas (which assume USCG approval)

• Foreign crews operating under exemptions must comply with Jones Act for any "coastwise" movements (e.g., transport between U.S. ports)

Example: A Norwegian-flagged supply vessel supporting a Gulf of Mexico platform uses a Filipino crew. The crew obtains B1 OCS visas because Transocean (the operator) has an USCG Letter of Non-Applicability. However, if the vessel transports goods from Port A to Port B in the U.S., it must comply with Jones Act requirements (which it may violate, hence the exemption).

Jones Act and B1 Wind

Applicability: YES—as of January 1, 2021 (OCSLA amendment in NDAA 2021).

Impact: Jones Act now explicitly applies to offshore wind activities on the OCS. This has created significant operational challenges:

• WTIV Constraint: Specialized wind-turbine installation vessels (WTIVs) that exist globally are almost entirely foreign-built, foreign-flagged, with foreign crews

• U.S. Compliance Gap: There are currently very few Jones Act-compliant WTIVs. Dominion Energy is building its own U.S.-flagged WTIV ("Charybdis") at a cost of several hundred million dollars

• Crew Impact: B1 Wind crews working on foreign-flagged WTIVs must still comply with Jones Act restrictions for any U.S. movements

• Future Outlook: As more projects proceed, more U.S.-flagged vessels will be needed, but current supply is severely limited

Key Point: Jones Act compliance does NOT negate the need for B1 Wind visas, but it does affect which vessels can operate and how they move in U.S. waters.

AOWFA and the American Offshore Worker Fairness Act: 2026 Threats

What is AOWFA?

The American Offshore Worker Fairness Act (AOWFA) is a proposed legislative amendment to OCSLA designed to: 1. Restrict the number of B-1 OCS visas issued 2. Limit which foreign mariners can work on U.S. OCS vessels 3. Require foreign mariners to hold TWIC (Transportation Worker Identification Credential) cards

AOWFA's Visa Limits

Current Status (2026): AOWFA has not been fully enacted but remains under legislative consideration.

Proposed B1 OCS Visa Cap:

• Limits foreign mariners to 2.5 times the vessel's safe manning document crew number

• Example: If a platform is manned by 50 people, maximum 125 foreign workers can hold B1 OCS visas for that vessel

• Current estimate: ~4,000 B1 OCS visas issued annually; AOWFA would create caps

Nationality Restrictions:

• Foreign mariners on U.S. OCS vessels must be either:

  • U.S. citizens or lawful permanent residents, OR

  • Citizens of the vessel's flag country

• This eliminates the current practice of hiring low-wage crews from third-party nations

TWIC Requirement:

• Foreign mariners will be required to obtain TWIC cards (facility access, background check)

• Additional processing time and cost

Impact on B1 OCS in 2026

If AOWFA passes in 2026:

• Visa issuance will become more competitive (limited slots per vessel)

• Approval may depend on vessel-specific quota (not guaranteed)

• Processing times could lengthen (TWIC verification)

• Companies may need to plan crew rotations more strategically

Impact on B1 Wind

Good news: AOWFA targets OCS mineral extraction activities. Wind is explicitly not an OCS activity, so AOWFA restrictions do not apply to B1 Wind visas.

However, offshore wind still faces separate regulatory threats:

• Trump administration wind leasing halt (Jan 2025) creates uncertainty

• Future congressional action on offshore wind tax credits and subsidies

• Potential future legislation that could separately regulate wind crew visas

Can One Person Hold Both B1 OCS and B1 Wind Annotations Simultaneously?

The Short Answer: No

You cannot hold both annotations on a single B-1 visa. Here's why:

The Legal and Practical Reasons

1. Each visa is project-specific: B-1 visas (both OCS and Wind) are tied to a specific employer, vessel, and project. The visa annotation reflects that specific activity.

2. Incompatible legal frameworks: B1 OCS assumes OCSLA compliance (mineral extraction, manning restrictions). B1 Wind assumes non-OCS activity (no OCSLA manning restrictions). A single visa cannot simultaneously claim and disclaim OCSLA applicability.

3. Consular practice: The consular officer issues one visa per application, with one annotation. You cannot ask for "both" on a single visa.

What If You Want to Switch Between OCS and Wind Work?

Scenario 1: You're on a B1 OCS visa and want to switch to a wind project mid-deployment

You cannot simply "switch." You must: 1. Exit the U.S. (or the relevant OCS area) 2. Apply for a new B1 Wind visa at a U.S. Embassy or Consulate (typically in your home country) 3. Obtain new employment documentation from the wind project 4. Wait for processing (typically 1–2 weeks in fast-processing posts) 5. Attend a new visa interview and receive the new B1 Wind visa

This is disruptive and costly. It's why companies plan crew rotations carefully.

Scenario 2: You're on a B1 Wind visa and want to work on an oil/gas project

Same process: 1. Exit the U.S. 2. Request new visa interview 3. Employer must secure USCG exemption letter (60–90 days) 4. Apply for B1 OCS visa 5. Wait for processing and interview 6. Receive new B1 OCS visa

Practical Implication for Rotating Crews

Offshore crew members often rotate between projects. If you plan to work alternately on oil/gas and wind projects, coordinate with both employers to:

• Front-load the USCG exemption letter (get it before you depart)

• Plan visa applications for transition periods between contracts

• Maintain home country presence (keep your permanent address active, don't claim U.S. residency)

• Document all employment contracts for consular review

How to Determine Which Visa You Need: A Decision Flowchart

START: You're hired for offshore work in U.S. waters

↓

QUESTION 1: Is the primary activity oil, gas, or mineral extraction?

├─ YES → GO TO QUESTION 2

├─ NO → GO TO QUESTION 3

QUESTION 2: Will you work on a drilling rig, production platform, or subsea mineral-related infrastructure?

├─ YES → You need B1 OCS

│        └─ Employer must secure USCG exemption letter (LOA/LOE/LOD)

│        └─ Apply for B-1 visa with "OCS" annotation

│        └─ Validity: typically 3–6 months

│

├─ NO → Go back; you may have misidentified the activity

QUESTION 3: Is the primary activity wind energy/electricity generation?

├─ YES → GO TO QUESTION 4

├─ NO → You may need a different visa category (C-1/D, B-1 general, etc.); consult an immigration attorney

QUESTION 4: Will you work on a wind turbine, subsea cable, or wind farm installation/maintenance vessel?

├─ YES → You need B1 WIND

│        └─ USCG exemption letter NOT needed (wind is not OCS activity)

│        └─ Apply for B-1 visa with "B-1 for Transit/Travel to OCS for Wind Activities; Not OCS Activity" annotation

│        └─ Validity: typically 6–12 months or project duration

│

├─ NO → Clarify the project scope; if still unclear, consult immigration attorney

END: You have identified your visa category

Frequently Asked Questions (FAQs)

FAQ 1: I already have a B1/B2 visitor visa. Can I use it to work offshore?

No. A standard B1/B2 visa does not have the OCS or Wind annotation. Without these specific annotations, you are not authorized to work offshore on the OCS, even if your visa is valid. You must apply for a new visa with the appropriate annotation (B1 OCS or B1 Wind). Attempting to work without the proper annotation is a visa violation.

FAQ 2: My employer says they'll get the USCG exemption letter "after I arrive." Is that okay for B1 Wind?

For B1 Wind: It doesn't matter—you don't need a USCG letter. But you do need employer documentation (employment contract, project letter). Have those ready before you apply for the visa.

For B1 OCS: No, this will not work. The USCG exemption letter must be obtained before you apply for the visa. It typically takes 60–90 days. If your employer hasn't started the process, ask them to do so immediately. You cannot get a B1 OCS visa without it.

FAQ 3: Can I apply for a B1 OCS visa online, or do I have to go to the Embassy?

Application: The DS-160 form is completed online. However, you must attend an in-person interview at a U.S. Embassy or Consulate in your home country. There is no online visa interview for B-1 visas (as of 2026).

FAQ 4: If my B1 Wind visa is denied, what should I do?

1. Request the denial reason (you should receive written notice under INA Section 221(g) or 214(b))

2. Wait at least 6 months before reapplying—reapplying too quickly suggests you haven't addressed the issue

3. Address the stated concern: If denied for "weak ties to home country," gather more evidence of employment, family, property, and financial stability there

4. Consider consulting an immigration attorney to review your previous application and strengthen the reapplication

5. Do NOT reapply multiple times in quick succession—this can result in a pattern of denials that makes future approval harder

FAQ 5: What's the difference between a Letter of Non-Applicability (LOA) and a Letter of Determination (LOD)?

Letter of Non-Applicability (LOA):

• Issued by USCG to a vessel

• States that the vessel is >50% foreign-owned, so OCSLA manning requirements don't apply to the vessel as a whole

• Used when an entire vessel's crew can be foreign nationals

• Example: A supply vessel working for an oil company

Letter of Determination (LOD):

• Issued by USCG to a specific individual

• States that this particular person is NOT part of the vessel's regular crew; they are a temporary specialist

• Used for individuals (engineers, divers, technicians) who work alongside a regular crew

• Example: A diver joining a platform crew for a specific well intervention

For B1 OCS visas: You need either an LOA (if you're part of the vessel crew) or an LOD (if you're a specialist). Your employer tells the USCG which type is appropriate.

FAQ 6: I'm from Canada. Do I need a B1 OCS visa if I'm normally visa-exempt?

Yes, absolutely. Even though Canadian citizens can enter the U.S. visa-free for business visits under normal circumstances, OCS work is a specific exception. If you're performing OCS activities, you must have a B1 OCS visa with the proper USCG exemption letter. The visa-exempt status does not cover offshore work.

FAQ 7: Can my family visit me while I'm working offshore on a B1 OCS visa?

No. B1 OCS visas are for temporary work only. They authorize you to work on OCS installations, not to reside in the U.S. or bring family. Your family would need separate visitor visas (B-2) if they wanted to visit the U.S. mainland, but they cannot visit you on an active oil rig or platform (for safety and security reasons). Plan family visits during your time off between contracts when you're in your home country.

FAQ 8: Is the B1 Wind visa going to become a dedicated category like B1 OCS in the future?

Possibly, but not certain. As of 2026, B1 Wind remains an annotation on the B-1 visa (a workaround). Some industry advocates argue that, given the scale of U.S. offshore wind development, a dedicated visa category (like "B1 Wind Energy") would streamline the process. However, this would require Congressional action to amend immigration law. The Trump administration's current stance against offshore wind (2025 leasing halt) makes legislative expansion unlikely in the near term. If Democratic administrations return and expand offshore wind, B1 Wind might gain status as a standalone category. For now, assume the annotation remains.

Conclusion: Get It Right the First Time

The difference between B1 OCS and B1 Wind is not semantic—it's fundamental. It reflects two different legal frameworks, two different regulatory regimes, and two different pathways to your deployment.

B1 OCS is the proven, established pathway for oil and gas workers. It requires OCSLA compliance, USCG oversight, and robust exemption letters. Companies like Transocean and Seadrill have deployed thousands of workers under this category.

B1 Wind is the newer, streamlined pathway for offshore wind professionals. It sidesteps USCG requirements because wind is not a mineral activity. It's designed to facilitate rapid deployment of international expertise to a growing renewable energy sector.

Applying for the wrong one can cost you time, money, and credibility. A visa denial is recorded in your immigration file. Future applications face increased scrutiny. Project delays compound into financial losses.

At CrewVisas, we've helped offshore crew members from across Europe—Latvia, Lithuania, Poland, Romania, Germany, Spain, and beyond—navigate these distinctions since our founding 20+ years ago. We've processed over 3,000 successful visa applications, and we understand both categories inside and out.

If you're unsure which visa you need, or if your employer is unclear, get specialized advice before filing the DS-160. A single consultation can prevent a costly mistake.

Related CrewVisas Resources

We've published detailed guides on related topics:

• "How to Get a B1 OCS Visa in 2026" – Step-by-step walkthrough of the B1 OCS application, USCG letter requirements, and interview tips

• "C1/D Visa for Seafarers: Complete Guide 2026" – For crew members needing short-term (29-day) vessel access

• "Jones Act Compliance for Offshore Workers" – How U.S. maritime law intersects with visa requirements

Legal Disclaimer

This article is provided for informational purposes only and does not constitute legal advice. Immigration law is complex and frequently subject to regulatory changes. While we've made every effort to ensure accuracy as of March 2026, regulations, consular practices, and visa policies may change without notice.

Your specific situation may require individualized legal counsel. Visa eligibility, processing times, and approval are determined by U.S. Department of State consular officers and the U.S. Customs and Border Protection agency, and each case is assessed individually. Approval is not guaranteed based on meeting stated requirements.

If you are applying for a B1 OCS or B1 Wind visa: 1. Consult with a qualified U.S. immigration attorney in your jurisdiction 2. Verify current requirements with the U.S. Embassy or Consulate where you'll apply 3. Confirm USCG exemption letter status with your employer (for B1 OCS) 4. Do not provide false or misleading information on any government form

CrewVisas is a maritime visa agency based in Riga, Latvia, operated by Dace Kumpiņa. We are not a law firm and do not provide legal advice. We provide visa processing assistance and guidance based on our experience and publicly available information. For legal matters, please consult a licensed immigration attorney.

For more information about CrewVisas services, contact us through our website at www.crewvisas.com.