A marina fire has two features that set it apart from a fire ashore. The fuel load, boats full of gasoline, diesel, fiberglass and upholstery, sits packed side by side on floating docks, and the nearest hydrant may be hundreds of feet away down a narrow pier. The fire codes respond by requiring extinguishers at fixed points along the docks, while salt air means the extinguishers themselves must survive the setting. This guide explains the International Fire Code's marina provisions, how NFPA 303 fits in, what boats are required to carry, and how the agents and construction options compare.
The standards that apply
| Standard | Covers | Key extinguisher provisions |
|---|---|---|
| International Fire Code, marinas | Piers, wharves, floats and marina facilities | 2-A:20-B:C at each required standpipe hose connection; more units as the hazards require, under NFPA 10 |
| International Fire Code, marine motor fuel-dispensing | Fuel docks | At least 20-B:C, one on each float and one within 25 ft of the head of the gangway |
| NFPA 303 | Marinas and boatyards | Referenced by the fire code for electrical installations and for berthing and storage |
| NFPA 10 | Portable extinguishers in all occupancies | Selection, spacing, inspection and maintenance |
| 46 CFR 25.30 | Uninspected motorboats | Number of portable extinguishers required aboard, by boat length |
Local amendments are common in coastal jurisdictions, and harbor authorities may add their own rules, so the local version always governs.
Fuel docks
Marine fuel docks must meet the fire code's general fuel-dispensing rules plus a marine-specific extinguisher rule. Each float needs a portable extinguisher rated at least 20-B:C, and one more must be on the pier or wharf within 25 feet of the head of the gangway leading down to the float. That second unit can be omitted when the fuel dock office is itself within 25 feet of the gangway. Fuel spills onto or near the water must be reported immediately to the fire department or the authority with jurisdiction.
Piers, floats and standpipes
Piers and floats need a standpipe system when the hose lay from fire apparatus would exceed 150 feet, with valved 2½-inch hose connections no more than 150 feet apart. Each required connection must have an emergency staging area at least 4 by 10 feet and an extinguisher rated at least 2-A:20-B:C. The fire code official can require additional extinguishers suited to other hazards on the site. The marina's emergency plan must show where every extinguisher and hose cabinet is, and posted procedures must tell staff where to find them.
Comparing agents for marinas
| Agent | Classes | Fit at a marina | Limitation |
|---|---|---|---|
| ABC (monoammonium phosphate) | A, B, C | Covers boats, upholstery, wiring and fuel; meets the 2-A:20-B:C standpipe rule | Powder residue; corrodes metal if not cleaned up |
| Purple K (potassium bicarbonate) | B, C | More than twice as effective as sodium bicarbonate on fuel fires; strong choice at the fuel dock | No A rating, so not a substitute at standpipe stations |
| Carbon dioxide | B, C | No residue in engine rooms and electrical spaces | Short range, disperses in wind on open docks |
| Halotron I (clean agent) | B, C; A on larger models | No residue on electronics and helm stations | Higher cost per unit of rating |
Construction for salt air
Salt spray attacks steel cylinders, valve stems, gauges and pull pins. A unit that corrodes may not discharge when needed, and a corroded cylinder should be replaced rather than recharged. Manufacturers address this with finishes and materials rather than different agents.
| Option | What it offers | Best use |
|---|---|---|
| Standard painted steel | Lowest cost | Inside offices, shops and dry storage buildings |
| Chrome-finish units | Chrome-plated cylinder supplied with a vehicle/marine bracket | Aboard boats and in sheltered spots near the water |
| Buckeye Offshore line | Galvanized undercoat, baked-on enamel and clear coat that pass a 3,000-hour salt spray test; stainless steel levers; plated brass valves; USCG approved with marine bracket | Pier and fuel dock posts exposed to spray |
Our marina fire extinguishers category includes the Buckeye Offshore units in ABC and Purple K alongside chrome and marine-bracket models.
What boats must carry
Federal rules set the minimum number of portable extinguishers aboard uninspected motorboats, counted in units rated 5-B.
| Boat length | No fixed system in the machinery space | With a fixed system |
|---|---|---|
| Under 16 ft | 1 | 0 |
| 16 ft to under 26 ft | 1 | 0 |
| 26 ft to under 40 ft | 2 | 1 |
| 40 ft to 65 ft | 3 | 2 |
One 20-B unit may replace two 5-B units, and units with higher ratings or more classes may be used. Outboard boats under 26 feet that carry no passengers for hire and are built so they cannot trap fuel vapors are exempt. Marinas that run rental fleets, boat clubs or workboats should check each vessel against this table. Disposable marine units, such as the Kidde Mariner line, are a common way to equip a small fleet. Our marine safety department carries other equipment for boats and docks.
Boat storage and service areas
Dry-stack racks, boatyards and service shops hold fuel tanks, batteries, solvents and fiberglass under one roof. NFPA 10 treats areas with five gallons or more of flammable liquid as extra hazard, needing at least 40-B within 30 feet or 80-B within 50 feet. High-rated ABC units close to the racks, and a wheeled unit in large service bays, are the usual approach.
Inspection and service
OSHA requires a monthly visual inspection and an annual maintenance check, with records kept. NFPA 10 adds a six-year internal examination and a 12-year hydrostatic test for stored-pressure dry chemical units. At a marina, the monthly check should also look for rust on the cylinder, valve and gauge, and for salt crust on the nozzle.
Common mistakes
- Mounting standard painted units on open piers. Spray attacks paint, valves and gauges; units built for marine exposure are the safer choice.
- Using Purple K at standpipe stations. The fire code calls for 2-A:20-B:C there, which needs an ABC unit.
- Forgetting the gangway unit. The fuel dock rule requires one on the pier near the gangway, not only on the floats.
References
- International Fire Code, marinas and marine motor fuel-dispensing provisions (2015 and 2018 editions as adopted in the Seattle Fire Code, chapters 23 and 36).
- NFPA 303, Fire Protection Standard for Marinas and Boatyards, as referenced by the International Fire Code.
- NFPA 10, Standard for Portable Fire Extinguishers, section 5.4, as summarized in Amerex Corporation Tech Tip 47.
- 46 CFR 25.30-20, fire extinguishing equipment required on motorboats.
- Buckeye Fire Equipment, Offshore extinguisher product information (model 13760).
For gloves, eye protection, spill control and the rest of the equipment these sites need, see our guide to marina safety equipment.
This guide is educational. Requirements vary by jurisdiction and code edition, and selection and compliance remain the operator's responsibility. Confirm ratings, quantities and placement with your fire marshal or harbor authority.
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