Home › Education and Research › Marine & Military › NFPA 312
NFPA 312: Fire Protection on Vessels During Construction and Repair
A vessel under repair is a building with its systems torn open, floating. NFPA 312 is the standard for keeping it from burning while the work runs.
NFPA 312 covers fire protection for vessels during construction, conversion, repair, and lay-up: the window when the ship’s own fire systems may be down, shore connections carry the load, hot work runs daily, and the watch requirements scale with the exposure. It works alongside NFPA 306’s atmosphere control and the OSHA shipyard rules, and yards apply it through their fire safety plans.
The exposure window
In service, a vessel carries its own detection, suppression, and crew. In the yard, those may all be off: systems drained or cut, crew gone, temporary services strung through open hatches, and ignition sources everywhere the work is. The standard exists for exactly that window.
What NFPA 312 addresses
| Area | What it covers | Note |
|---|---|---|
| Impaired ship systems | Managing detection and suppression that is out of service during work | The vessel’s own impairment problem |
| Temporary protection | Shore water supply, hoses, extinguishers staged aboard | The yard carries the load |
| Ignition control | Hot work coordination, temporary electrical, smoking control | Where fires start |
| Watch coverage | Human detection scaled to the exposure, commonly off-hours | The yard’s plan sets it |
Shore support
The dockside becomes the vessel’s fire department: hydrants and hose reach, extinguishers staged at gangways and work sites, communication with the yard’s response, and access routes that stay clear. The plan maps it before the first shift, because improvising it during a fire on a vessel does not work.
The watch on a vessel
Rounds cover spaces, not sightlines
Above, below, and beyond every bulkhead near hot work
Nights and weekends are when yards burn
A means that works from inside steel
How the pieces stack
The vessel’s protection during the work: systems, shore support, watches.
The atmosphere: Marine Chemist certificates before the torch.
The workers: federal law for shipyard employment, including 1915.504 watches.
Vessel repair questions
The yard and the vessel’s owner share it through the contract and the fire safety plan; the plan assigns the specifics. The AHJ layer varies with the location and the authority over the facility.
Lay-up is a named condition in the standard for a reason: dead ships with dead systems still burn. Coverage terms usually come from the insurer and the facility.
Same duties, harder geometry: compartments instead of corridors, steel instead of drywall, and communications that must work below decks. Training and the route plan carry the difference.
Yard needs off-hours coverage?
Firefighter-run fire watch guards on site in under 3 hours, nationwide. Call 1-800-899-7524.
Educational summary, not legal advice. Marine and military fire protection runs on specialized authorities: the applicable federal rules, certificates, facility instructions, and contract terms govern. NFPA® standards are copyrighted publications of the National Fire Protection Association. The Fast Fire Watch Company is not affiliated with or endorsed by the NFPA, OSHA, the US Coast Guard, or the Department of Defense.