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Fixed wing aerial dispersant capability
This fixed wing aerial dispersant capability is part of the National Plan to combat pollution of the sea by oil and other noxious and hazardous substances (National Plan). The capability was developed in conjunction with—and is jointly funded by—the Australian Institute of Petroleum (AIP) through its Geelong-based Australian Marine Oil Spill Centre (AMOSC).
Based on the concept of using large agricultural fixed wing aircraft to apply oil spill dispersants, the capability is designed to complement dispersant spraying arrangements using helicopters, which are typically confined to close inshore work.
We maintain six aircraft strategically located to provide full coverage of the Australian coastline.
The aircraft are located in:
- Ballarat, Victoria
- Adelaide, South Australia
- Ballidu, Western Australia
- Batchelor, Northern Territory
- Emerald, Queensland
- Moree, New South Wales.
Aircraft types and capability
We use two models of aircraft—air tractor and thrush aircraft—to apply dispersant.
These two models of aircraft are used throughout the world for oil dispersant operations in addition to agricultural and fire fighting activities. All aircraft are turbine powered single engine and have the ability to carry between 2200 and 3600 litres of dispersant dependent on hopper size and the distance required to be flown to apply the dispersant.
When applying dispersant, aircraft may need to fly as low as 7-10 metres above the water. The air tractor and thrush aircraft are specifically designed to fly at such heights allowing the operations to be conducted safely and the dispersant applied accurately and effectively.
Features allowing the aircraft to do this include:
- Real time navigation equipment allowing the aircraft to fix position, in real time, relative to the ground or water.
- Continuous real time readout in latitude and longitude ensuring the pilot can at all times identify the position of the aircraft.
- Data logging system allowing the aircraft at all times to log and record its position whilst also recording the flight path of the aircraft.
Activation of aircraft
Aircraft are activated by AMSA upon notification of an oil spill that threatens to cause pollution damage, particularly in sensitive areas, and following advice from environmental experts that the targeted application of dispersants is an appropriate response method given the particular circumstances of the spill. Each aircraft is available to fly with a maximum of four hours notice, twenty-four hours per day, seven days per week.
Airbase manager and loading crew
We will also activate an airbase manager who is responsible for the management and supervision of the aircraft whilst also overseeing the loading of dispersant into the aircraft. The loading crew may consist of up to two personnel who are responsible for loading dispersant into the aircraft in addition to assisting with aircraft refuelling operations.
Dispersant is stored in 205 litre drums or 1000 litre containers.
The dispersant is pumped into the aircraft using a pump and dry coupling brake which prevents any spillage when connecting or disconnecting the hose to the aircraft.
We maintain stockpiles of dispersant strategically positioned throughout Australia. Stockpiles may consist of a variety of dispersant types. The type of dispersant stored within a specific area is generally determined by the level of risk and the type of oil products which transit through that particular area.
Upon activating the fixed wing aerial dispersant capability, we will coordinate the transport of the dispersant and the dispersant loading equipment to the airfield where the aircraft will be based. We will establish an airbase at the nominated airfield and all dispersant aircraft will operate from this airfield during the oil spill response.
Due to the height and speed the dispersant aircraft are required to fly at it is extremely difficult for the pilot alone to determine when to apply the dispersant.
To assist the pilot in applying the dispersant a separate aircraft with a trained aerial observer onboard is tasked to fly above the aircraft and direct the pilot towards the heaviest concentrations of oil. The air observer
will direct the pilot when to commence and cease spraying. The air observer will monitor the success of the dispersant operations and report back to incident management team.
Aircraft undertaking dispersant operations may be supported by a number of response assets dependent on the operational requirements of the incident. This may include satellite aircraft tracking, surface vessels, fixed wing and rotary aircraft.
These assets are deployed to provide assistance to the dispersant aircraft should the aircraft encounter any difficulties during its operation.
More information on the use of dispersants during oil spill response can be found at our pollution reponse section.