Marinas have high fuel loads from fiberglass boats, gasoline/diesel fueling stations and wooden piers. NFPA 303 (Marinas and Boatyards) defines pier sprinkler design, fuel dispenser separation, and yacht-interior detection. A burning fiberglass boat can sink in 20 minutes — the response window is tight.
Pier Sprinkler
- NFPA 303 4.4: Overhead sprinkler required for piers >8 m or 8 boats
- Design density: 8 L/min/m2 (0.2 gpm/ft2)
- Water source: Seawater pump (corrosion-resistant bronze body)
- Hydrant: One per 45 m of pier length
Fuel Dispenser
- Separation: Dispenser to building minimum 15 m
- Electrical: Class I Div 2, 5.5 m radius
- Emergency shutoff: At dispenser + remote at 7.6 m distance
- Spill control: Absorbent kit at each dispenser, foam boom for water spills
Yacht Interior Detection
For enclosed cabin boats:
- Engine room: CO2 or HFC automatic suppression
- Cabin: smoke detector (NFPA 72)
- Galley: heat detector (prevents false alarms at night)
- LPG galley: solenoid shutoff + LEL sensor
Wooden Pier Fires
Creosote-treated wood piers burn rapidly. Mitigations:
- Prefer FRP (Fiber Reinforced Plastic) or steel pier
- FR coating on wood pier (poor durability)
- Fire alarm horn at pier head
- Marina manager 911 + coast guard protocol
Marina sprinklers with SprinkCalc
SprinkCalc sizes marina pier sprinkler systems with 8 L/min/m2 density, seawater pump pressure and hydrant spacing per NFPA 303.
Download SprinkCalc on the App Store
Sources & Further Reading
NFPA 303, NFPA 302 (Pleasure Craft), NFPA 72, USCG Marina Safety Guide. NFPA 303 Marinas standard.