A DIFFS is typically utilised on the deck of a helipad, or in a concrete ﬂoor for aircraft hangar applications. DIFFS Nozzles are typically integrated into the ﬂoor area.
- Standards for Offshore Helicopter Landing Area
- Civil Aviation Authority, Safety Regulation Group
- 7th edition 01/20123
ICAO Annex 14, Vol.1
- Aerodrome Design and Operations
- International Civil Aviation Organisation
- 11th amendment 15/2013
Each deck integrated nozzle will spray upwards in a semi sphere shape covering both the deck and the helicopter. To achieve the required the application rate on the helideck multiple nozzles will need to be positioned with a specific overlap as per below graph.