NAICS 4831 - Deep Sea, Coastal, and Great Lakes Water Transportation

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Related NAICS Codes for NAICS 4831

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What is NAICS 4831

NAICS code 4831 encompasses businesses engaged in deep sea, coastal, and Great Lakes water transportation. This sector includes companies that operate vessels providing cargo and passenger transportation services over long distances on oceans, coastal routes, and the Great Lakes. Operators in this industry manage the logistics of maritime transport, facilitating the movement of goods such as bulk commodities, containers, and specialized cargo across regional and international waters. Government agencies contract for these services to support national defense logistics, supply chain continuity, disaster response, and infrastructure projects that require reliable maritime transport capabilities.

Businesses within this NAICS code range from large ocean carriers to regional operators specializing in coastal or Great Lakes navigation. The sector plays a critical role in ensuring the efficient and secure movement of goods, especially in support of federal missions that involve deployment of resources, humanitarian aid, or the transportation of critical materials. Contracting opportunities often arise due to the government’s need for reliable, cost-effective maritime transportation solutions that comply with federal regulations and security requirements.

Breakdown for NAICS 4831

  • Includes transportation of cargo and passengers over oceans, coastal waters, and the Great Lakes.
  • Covers both domestic and international maritime shipping services.
  • Applies to businesses operating vessels such as container ships, bulk carriers, and ferries.
  • Typical size standards are based on vessel gross tonnage and annual revenue.
  • Supports government missions including defense logistics, disaster response, and infrastructure support.

Included Activities for NAICS 4831

  • Operating deep sea cargo shipping services.
  • Providing coastal freight transportation.
  • Conducting passenger ferry operations on Great Lakes routes.
  • Chartering vessels for government logistics support.
  • Handling specialized cargo including military equipment and hazardous materials.
  • Coordinating maritime transport scheduling and logistics.
  • Ensuring vessel compliance with safety and environmental regulations.
  • Supporting emergency evacuation and disaster relief efforts via maritime transport.

Business Types for NAICS 4831

  • Ocean freight carriers
  • Coastal shipping companies
  • Great Lakes ferry operators
  • Maritime logistics service providers
  • Vessel charter and leasing firms
  • Specialized cargo transport operators

Government Buyers for NAICS 4831

Federal agencies such as the Department of Defense (DoD), the U.S. Coast Guard, the Maritime Administration (MARAD), and the General Services Administration (GSA) are principal buyers of services under NAICS 4831. These agencies require deep sea and coastal water transportation to support military logistics, supply distribution, emergency response operations, and infrastructure development projects. Additionally, state and local governments may contract for passenger and cargo water transportation services to support regional economic development and emergency evacuation plans. The government’s need for secure, timely, and compliant maritime transport drives procurement in this sector.

Contract Types & Procurement for NAICS 4831

Contracts in this sector typically include firm-fixed-price, cost-reimbursement, and indefinite-delivery/indefinite-quantity (IDIQ) contracts. Procurement methods often involve competitive bidding, negotiated contracts, and sometimes sole-source awards when specialized vessels or routes are required. Contract values vary widely depending on the scope and duration of the service, ranging from short-term charters valued at tens of thousands of dollars to multi-year logistics support contracts worth millions. Government contracts may also include clauses related to vessel compliance with safety and environmental regulations, and performance metrics tied to delivery schedules and cargo handling.

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