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US Standard Industrial Classification (SIC) Code Lookup

Division: D - Manufacturing

US-SIC Code 3731 - Ship Building and Repairing

Industry Description

Establishments primarily engaged in building and repairing ships, barges, and lighters, whether self-propelled or towed by other craft. This industry also includes the conversion and alteration of ships and the manufacture of off-shore oil and gas well drilling and production platforms (whether or not self-propelled). Establishments primarily engaged in fabricating structural assemblies or components for ships, or subcontractors engaged in ship painting, joinery, carpentry work, and electrical wiring installation, are classified in other industries.

Business Examples

Common types of business activities within US SIC 3731 - Ship Building and Repairing are:

  • Barges, building and repairing
  • Cargo vessels, building and repairing
  • Combat ships, building and repairing
  • Crew boats, building and repairing
  • Dredges, building and repairing
  • Drilling and production platforms, floating, oil and gas
  • Drydocks, floating
  • Ferryboats, building and repairing
  • Fireboats, building and repairing
  • Fishing vessels, large: seiners and trawlers-building and repairing
  • Hydrofoil vessels
  • Landing ships, building and repairing
  • Lighters, marine: building and repairing
  • Lighthouse tenders, building and repairing
  • Marine rigging
  • Naval ships, building and repairing
  • Offshore supply boats, building and repairing
  • Passenger-cargo vessels, building and repairing
  • Patrol boats, building and repairing
  • Radar towers, floating
  • Sailing vessels, commercial: building and repairing
  • Scows, building and repairing
  • Seiners, building and repairing
  • Shipbuilding and repairing
  • Submarine tenders, building and repairing
  • Tankers (ships), building and repairing
  • Tenders (ships), building and repairing
  • Towboats, building and repairing
  • Transport vessels, passenger and troop: building and repairing
  • Trawlers, building and repairing
  • Tugboats, building and repairing

IBISWorld Industry Research Report

Ship Building in the US (33661a)

Revenue 2025

$40.9bn

Growth 2025

6.92%

Key Trends

  • An increase in US oil and gas production has provided a constant need for commercial shipbuilders

  • The massive US Navy continues to be the backbone for domestic shipbuilders

  • The shipyard optimization program will improve shipyard efficiency and repair infrastructure

Products and Services

US-SIC Hierarchy 3731 - Ship Building and Repairing

US-SIC Code 3731 - Ship Building and Repairing sits in the 2-digit Ship Building and Repairing sector. US SIC codes can be 2 to 8 digits and the further along the hierarchy, the more detailed and specific the category will be.

Division: D

Division Title: Manufacturing

2 Digits 3 Digits 4 Digits

Extended US-SIC Hierarchy for 3731 - Ship Building and Repairing

For business marketing and targeting, US SIC Codes have been extended to provide more specific classifications within US-SIC 3731 - Ship Building and Repairing. Extended US SIC Codes are being continuously updated to reflect the current business environment.

6 Digit SIC Codes

  • 373101 Ship builders & repairers
  • 373102 Barges (manufacturers)
  • 373103 Ship ceiling (manufacturers)
  • 373104 Ship yards

8 Digit SIC Codes

  • 37310000 Shipbuilding and repairing
  • 37310100 Commercial cargo ships, building and repairing
  • 37310101 Barges, building and repairing
  • 37310102 Cargo vessels, building and repairing
  • 37310103 Fireboats, building and repairing
  • 37310104 Fishing vessels, large: building and repairing
  • 37310105 Hydrofoil vessels
  • 37310106 Lighters, marine: building and repairing
  • 37310107 Lighthouse tenders, building and repairing
  • 37310108 Sailing vessels, commercial: building and repairing
  • 37310109 Scows, building and repairing
  • 37310110 Seiners, building and repairing
  • 37310111 Tankers, building and repairing
  • 37310112 Tenders, ships: building and repairing
  • 37310113 Towboats, building and repairing
  • 37310114 Trawlers, building and repairing
  • 37310115 Tugboats, building and repairing
  • 37310200 Military ships, building and repairing
  • 37310201 Combat vessels, building and repairing
  • 37310202 Landing ships, building and repairing
  • 37310203 Offshore supply boats, building and repairing
  • 37310204 Patrol boats, building and repairing
  • 37310205 Submarine tenders, building and repairing
  • 37310206 Submarines, building and repairing
  • 37310207 Transport vessels, troop: building and repairing
  • 37310300 Commercial passenger ships, building and repairing
  • 37310301 Crew boats, building and repairing
  • 37310302 Ferryboats, building and repairing
  • 37319900 Shipbuilding and repairing, nec
  • 37319901 Dredges, building and repairing
  • 37319902 Drilling and production platforms, floating (oil and gas)
  • 37319903 Drydocks, floating
  • 37319904 Marine rigging
  • 37319905 Radar towers, floating
  • 37319906 Submersible marine robots, manned or unmanned

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US SIC Code Directory

Each US SIC Code is part of a Division, which corresponds with a numerical range. Select a Division category from the table below, then drill down to discover the industries within that Division.

Division US-SIC Code Sector title
A 01-09 Agriculture, Forestry, and Fishing
B 10-14 Mining
C 15-17 Construction
D 20-39 Manufacturing
E 40-49 Transportation, Communications, Electric, Gas, and Sanitary Services
F 50-51 Wholesale Trade
G 52-59 Retail Trade
H 60-67 Finance, Insurance, and Real Estate
I 70-89 Services
J 90-99 Public Administration

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